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: An authorized client communication system seeking access to a host communication system may be identified by locating a memory segment within the client communication system that stores client software used to access the host computer system. The memory segment then is examined to determine whether the client software stored in the memory segment corresponds to client software for an official client communication, system. Communications from the client communication system are terminated when the client software in the memory segment is determined to diverge from software for an official client communication system.

Abstract: Leveraging an established authenticated session in obtaining authentication to a client application includes receiving a request for access to a client application requiring authentication of a requestor and determining whether there exist characteristics of leverageable authentications corresponding to established sessions having an authenticated state at a time of the determination. When the determination reveals characteristics of at least one leverageable authentication corresponding to an established session, and attempt is made to obtain access for the requester to the client application based on the at least one leverageable authentication, and the requestor is provided with a notification related to the attempt to obtain access for the requester to the client application.

Abstract: A messaging application user interface has an input element for receiving electronic messages and an output element for displaying electronic messages. The messaging application user interface can be implemented so as to maintain a subset of the plurality of potential message recipients, the subset being determined using a predetermined criterion. The messaging application user interface also can be implemented so as to auto-complete a partially entered address based on the subset of potential message recipients. A set of user-selectable signals that modify auto-completion behavior also can be used with the messaging application user interface. The messaging application user interface can be used in an instant messaging system to allow a user to send instant messages to and exchange comments with a plurality of other users without having to switch among several instant message windows.

Abstract: An authorized client communication system seeking access to a host communication system may be identified by locating a memory segment within the client communication system that stores client software used to access the host computer system. The memory segment then is examined to determine whether the client software stored in the memory segment corresponds to client software for an official client communication system. Communications from the client communication system are terminated when the client software in the memory segment is determined to diverge from software for an official client communication system.

Abstract: Communicating with and/or monitoring of a targeted used in computer-network environment (e.g., an instant messaging system) involves detecting that the targeted user has signed on to the network, and upon detecting the signon, automatically communicating with the targeted user, for example, by sending an instant message previously specified by a targeting user. Alternatively, or in addition, the targeting user can receive notification that the targeted user has signed on and/or that the instant message has been sent. Instead of, or in addition to, automatically sending an instant message and/or notifying the targeting user, a predefined operation specified by the targeting user (e.g., operating system command, script or executable file) can be performed. These various operations can be performed on one or more client systems, on one or more server systems, or any combination thereof.

Abstract: Communicating with and/or monitoring of a targeted used in computer-network environment (e.g., an instant messaging system) involves detecting that the targeted user has signed on to the network, and upon detecting the signon, automatically communicating with the targeted user, for example, by sending an instant message previously specified by a targeting user. Alternatively, or in addition, the targeting user can receive notification that the targeted user has signed on and/or that the instant message has been sent. Instead of, or in addition to, automatically sending an instant message and/or notifying the targeting user, a predefined operation specified by the targeting user (e.g., operating system command, script or executable file) can be performed. These various operations can be performed on one or more client systems, on one or more server systems, or any combination thereof.

Abstract: Perception of a personalization item in an instant messaging communications session may be enabled by perceiving an identifier corresponding to an intended instant message recipient designated by an instant message sender system, accessing personalization items corresponding to the perceived identifier, and making perceivable the personalization items corresponding to the received identifier to the instant messaging sender system for rendering in an instant messaging application running on the instant messaging sender system, where the personalization items are made perceivable prior to communication with the intended instant message recipient.

Abstract: Perception of a personalization item is enabled in an instant messaging communications session by rendering, on an instant message recipient system, an instant messaging application user interface for an instant messaging communications session involving at least an instant message recipient and an instant message sender. An identifier that enables identification of a personalization item of an individual instant message user is obtained, and the identifier is associated with the personalization item. The personalization item is obtained independently of the message used to obtain the identifier, and the personalization item is rendered at the instant message recipient system.

Abstract: Perception of wallpaper in an instant messaging communications session may be enabled by rendering, on an instant message recipient system, an instant messaging application user interface for an instant messaging communications session involving at least one instant message recipient and an instant message sender, receiving a message that includes a text message and wallpaper to be displayed by the IM recipient when perceiving the text message, the wallpaper being selected by the instant message sender system, and rendering the wallpaper at the instant message recipient system when rendering another portion of the message.

Abstract: Perception of a personalization item in an instant messaging communications session may be enabled by storing on a host system one or more personalization items associated with an instant messaging application operator, receiving a request from an instant messaging participant system for the personalization items associated with the instant messaging application operator, accessing the personalization items at the host system, and communicating the personalization items from the host system to the instant messaging participant system for rendering in an instant messaging application running on the instant messaging participant system.

Abstract: A messaging application user interface has an input element for receiving electronic messages and an output element for displaying electronic messages. The messaging application user interface can be implemented so as to maintain a subset of the plurality of potential message recipients, the subset being determined using a predetermined criterion. The messaging application user interface also can be implemented so as to auto-complete a partially entered address based on the subset of potential message recipients. A set of user-selectable signals that modify auto-completion behavior also can be used with the messaging application user interface. The messaging application user interface can be used in an instant messaging system to allow a user to send instant messages to and exchange comments with a plurality of other users without having to switch among several instant message windows.

Abstract: An authorized client communication system seeking access to a host communication system may be identified by locating a memory segment within the client communication system that stores client software used to access the host computer system. The memory segment then is examined to determine whether the client software stored in the memory segment corresponds to client software for an official client communication system. Communications from the client communication system are terminated when the client software in the memory segment is determined to diverge from software for an official client communication system.