Abstract: A client may be enrolled in a notification system by receiving a notification instruction for a user to enroll in the notification system, identifying metadata associated with the notification instruction, prompting the user for activation of notifications for the metadata based on the metadata, and enabling the user profile to receive notifications for the metadata when a user elects to receive notifications in response to the prompt.

Abstract: A host may be enabled to administer a notification system by receiving a notification instruction indicating a user has enrolled in the notification system, identifying metadata associated with the notification instruction, generating update criteria related to the notification instruction and the metadata, monitoring an online resource associated with the notification instruction, determining whether the online resource has been updated, using the update criteria to determine a predicted interest to the user, comparing the predicted interest to a threshold set with respect to the user, and generating a notification when the comparison indicates the user should receive the update.

Abstract: Delivering an electronic notification to an intended recipient may include communicating an electronic notification directed to an intended recipient, and determining presence information associated with the intended recipient before attempting to deliver the notification to the intended recipient. A cascaded delivery instruction also may be resolved based on notification information. The presence information and the cascaded delivery instruction may be used to select among several delivery mechanisms potentially available for the intended recipient based on the presence information, and to deliver the electronic notification to the intended recipient at the selected delivery mechanism. The presence information may include an online presence and/or a physical presence of the intended recipient.