Abstract: Social network information may be shared across online service providers. Thus, one online service provider M that maintains a membership separate from a second online service provider N may nevertheless use the social network maintained by the second online service provider N to tailor content and/or services base on such social network information.

Abstract: Announcing new users of an electronic communications system includes receiving an indication of a new user of an electronic communications system. The new user has an identifier for the electronic communications system. Existing users of the electronic communications system that are known to the new user are identified. The identified existing users are sent a message notifying the identified existing users of the identifier of the new user. The identified existing users may be enabled to add the identifier of the new user to participant lists used by the identified existing users. The new user may be enabled to add identifiers of the identified existing users to a participant list of the electronic communications system used by the new user.

Abstract: Social network information may be shared across online service providers. Thus, one online service provider M that maintains a membership separate from a second online service provider N may nevertheless use the social network maintained by the second online service provider N to tailor content and/or services base on such social network information.

Abstract: Social network information may be shared across online service providers. Thus, one online service provider M that maintains a membership separate from a second online service provider N may nevertheless use the social network maintained by the second online service provider N to tailor content and/or services based on such social network information.

Abstract: Transferring instant messaging sessions includes receiving a selection, from a user within a user interlace, of at least one instant messaging session from among multiple instant messaging sessions to transfer from a first instant messaging controller on a first device to at 5 least a second instant messaging controller on a second device, where the user is signed on concurrently to the first instant messaging controller on the first device and the second instant messaging controller on the second device. At least a portion of the selected instant messaging session is transferred from the first instant messaging controller on the first device to the second instant messaging controller on the second device and the transferred portion of 10 the instant messaging session is made perceivable on the second instant messaging controller on the second device.

Abstract: Announcing new users of an electronic communications system includes receiving an indication of a new user of an electronic communications system. The new user has an identifier for the electronic communications system. Existing users of the electronic communications system that are known to the new user are identified. The identified existing users are sent a message notifying the identified existing users of the identifier of the new user. The identified existing users may be enabled to add the identifier of the new user to participant lists used by the identified existing users. The new user may be enabled to add identifiers of the identified existing users to a participant list of the electronic communications system used by the new user.

Abstract: Announcing new users of an electronic communications system includes receiving an indication of a new user of an electronic communications system. The new user has an identifier for the electronic communications system. Existing users of the electronic communications system that are known to the new user are identified. The identified existing users are sent a message notifying the identified existing users of the identifier of the new user. The identified existing users may be enabled to add the identifier of the new user to participant lists used by the identified existing users. The new user may be enabled to add identifiers of the identified existing users to a participant list of the electronic communications system used by the new user.

Abstract: Organizing a participant list includes maintaining a participant list of users of an electronic communications system to be used by a first user of the electronic communications system. Communications strengths between the first user and each of the users included in the participant list are determined. The users included in the participant list are organized based on the corresponding communications strengths. Communications strengths may be determined for users included in a group within a participant list, and the users within the group may be organized within the group based on communications strength. An additional group in the participant list in which some or all of the users included in the participant list are organized based on communications strength may be provided.

Abstract: A graphical user interface on a display device of a computer enables communications using a computer service. The graphical user interface includes a list of potential message recipients selected by a user as significant to the user. The graphical user interface also includes a mobile device identifier associated with one or more of the listed potential message recipients and a user account identifier associated with one or more of the listed potential message recipients. At least one of the listed potential recipients includes a mobile device identifier as the only available conduit for data delivery to the potential message recipient using the computer service.

Abstract: Electronic messages may be processed using a stamp authority by receiving an electronic message, identifying a stamp associated the message, determining if the stamp is valid, and, if the stamp is determined to be valid, distinguishing the message from messages with which a valid stamp is not identified.

Abstract: Transferring instant messaging sessions includes receiving a selection, from a user within a user interlace, of at least one instant messaging session from among multiple instant messaging sessions to transfer from a first instant messaging controller on a first device to at 5 least a second instant messaging controller on a second device, where the user is signed on concurrently to the first instant messaging controller on the first device and the second instant messaging controller on the second device. At least a portion of the selected instant messaging session is transferred from the first instant messaging controller on the first device to the second instant messaging controller on the second device and the transferred portion of 10 the instant messaging session is made perceivable on the second instant messaging controller on the second device.

Abstract: Organizing a participant list includes maintaining a participant list of users of an electronic communications system to be used by a first user of the electronic communications system. Communications strengths between the first user and each of the users included in the participant list are determined. The users included in the participant list are organized based on the corresponding communications strengths. Communications strengths may be determined for users included in a group within a participant list, and the users within the group may be organized within the group based on communications strength. An additional group in the participant list in which some or all of the users included in the participant list are organized based on communications strength may be provided.

Abstract: Providing supplemental contact information for an individual referenced in an electronic message typically includes receiving an electronic message, examining the electronic message, detecting an identifier for a referenced individual contained in the electronic message, and making supplemental contact information for the referenced individual available to a recipient of the electronic message. The supplemental contact information may include information that is in addition to information contained in the electronic message. The supplemental contact information may include at least one of an e-mail address, a screen name, a telephone number, a facsimile number, and a mailing address, each of which is associated with the referenced individual.

Abstract: Transferring instant messaging sessions includes receiving a selection, from a user within a user interface, of at least one instant messaging session from among multiple instant messaging sessions to transfer from a first instant messaging controller on a first device to at 5 least a second instant messaging controller on a second device, where the user is signed on concurrently to the first instant messaging controller on the first device and the second instant messaging controller on the second device. At least a portion of the selected instant messaging session is transferred from the first instant messaging controller on the first device to the second instant messaging controller on the second device and the transferred portion of 10 the instant messaging session is made perceivable on the second instant messaging controller on the second device.

Abstract: Providing supplemental contact information for an individual referenced in an electronic message typically includes receiving an electronic message, examining the electronic message, detecting an identifier for a referenced individual contained in the electronic message, and making supplemental contact information for the referenced individual available to a recipient of the electronic message. The supplemental contact information may include information that is in addition to information contained in the electronic message. The supplemental contact information may include at least one of an e-mail address, a screen name, a telephone number, a facsimile number, and a mailing address, each of which is associated with the referenced individual.

Abstract: Social network information may be shared across online service providers. Thus, one online service provider M that maintains a membership separate from a second online service provider N may nevertheless use the social network maintained by the second online service provider N to tailor content and/or services based on such social network information.

Abstract: Systems and techniques for transferring electronic data between users of a communications system include a host system structured and arranged to receive and deliver messages of various types between users of the communications system. The host system includes an instant messaging network; a mail gateway; and a configuring network in communication with both the instant messaging network and the mail gateway. The instant messaging network enables instant messaging communication between users of the communications system and has the capability to monitor whether a certain user is capable of receiving an instant message at a particular moment. The mail gateway receives and delivers e-mail messages to users of the communications system. The configuring network is dedicated to automatically configuring instant messaging communication between an intended recipient of an e-mail message and the sender of the e-mail message.

Abstract: An incoming message and an indication of a sender-specified destination for the incoming message are received. In addition, a determination is made as to whether a mobile telephone number is known by the sender to be associated with the sender-specified destination. If a mobile telephone number is known by the sender to be associated with the sender-specified destination, a first message that is based on the incoming message is sent to the mobile telephone number. Furthermore, a second message is sent to the mobile telephone number that indicates that the first message was sent to the mobile telephone number based on a determination that the mobile telephone number is known by the sender to be associated with the sender-specified destination.

Abstract: A graphical user interface on a display device of a computer enables communications using a computer service. The graphical user interface includes a list of potential message recipients selected by a user as significant to the user. The graphical user interface also includes a mobile device identifier associated with one or more of the listed potential message recipients and a user account identifier associated with one or more of the listed potential message recipients. At least one of the listed potential recipients includes a mobile device identifier as the only available conduit for data delivery to the potential message recipient using the computer service.

Abstract: transciever Announcing new users of an electronic communications system includes receiving an indication of a new user of an electronic communications system. The new user has an identifier for the electronic communications system. Existing users of the electronic communications system that are known to the new user are identified. The identified users are sent a message notifying the identified existing users of the identifier of the new user. The identified existing users may be enabled to add the identifier of the new user to participant lists used by the identified existing users. The new user may be enabled to add identifiers of the identified existing users to a participant list of the electronic communications system used by the new user.