As a developer, you can figure out how to make your program connect to Facebook, Twitter, SMS, and Email. Or you can use the Embarke API and connect just to Embarke, a messaging platform that connects you to them all. You can skip learning the specifics of how to connect to each of them. The REST API's website has a five minute tutorial video on how to use this gateway to its developer tools for social communications.
As anyone with multiple social networking accounts can attest to, keeping track of them all can be time consuming. AIM Lifestream is a service from AOL that aggregates a number of social networking sites, and now Lifestream has been integrated into AOL Instant Messenger.