A Higher Functioning Friendfeed/ Google Alerts.

Essentially it would aggregate all of your incoming information streams. The information is filtered and delivered to you based on several properties of the user. It checks if the user is online, and only sends the most urgent message through if not. There is a lot of low priority information coming through, such as a friend eating ice cream, and that information should only get through if the user is paying 100% attention. It would also utilize several different information portals, such as SMS, email or IM to get that information to the user, based on where they are and what they are doing.