I can totally see Google taking on Facebook and invigorating another social networking development platform. Windows Live has one, as does Yahoo. Question is, who is going to build the platform for the platforms, so things will work everywhere?

Quoted: As I see it, the biggest shortcoming of social-networking sites is their inability to play well with others. Between MySpace, Facebook, LinkedIn, Tribe, Pownce, and the numerous also-rans, it seems as if maintaining an active presence at all of these sites could erode into becoming a full-time job. If Google can somehow create a means for all of these services to work together, and seamlessly interact with the Google family, then perhaps this is the killer app that people don't even realize they've been waiting for.