Expect to see a lot more discussion over the next few months on the issue of social network interopability and portability, as it's becoming an issue that's increasingly hard to ignore. Our "social graph" is the aggregate sum of our network and connection, the bits and pieces of information and content we pull together in various applications (Twitter, Flickr, Last.fm, Facebook, YouTube, Pownce, the list goes on).
It should be easier for us to move our "stuff" around, and we should be the ones that actually own the content (right now, everything that takes place within Facebook, for instance, is both unsearchable via Google and can't be used anywhere else. That sucks).
Here are some thoughts to get you thinking from Brad Fitz:
an increasing number of new "social applications" as well as traditional application which either require the "social graph" or that could provide better value to users by utilizing information in the social graph. What I mean by "social graph" is a the global mapping of everybody and how they're related, as Wikipedia describes and I talk about in more detail later. Unfortunately, there doesn't exist a single social graph (or even multiple which interoperate) that's comprehensive and decentralized. Rather, there exists hundreds of disperse social graphs, most of dubious quality and many of them walled gardens.
(check out the new version of Plaxo and their new lifestream feature called Pulse, which is an attempt to pull together various social media streams as a way of attacking the problem).