Although I'm getting a little weary of "social media" products I'm very interested in the technology and architecture behind Google's Buzz. Once again we see how differently syndication and synchronization are conceived and engineered by the GIS Enterprise and the Google. Federated Geo-Synchronization on the one hand (developed in a clean room behind a license wall) and on the other: HTTP, Atom, Web Linking, and PubSubHubbub.
Overly disruptive to other APIs? Maybe. Certainly it's a reminder that the web is one API that really counts and that makes me a happy boy.