Old news now of course :-) but surely the most devastating/interesting/wonderful technology announcement this year. Scoble has a round up of all the best bits on the new Google OpenSocial API that every social networking site on the planet is signing up to.
Plaxo, Ning, MySpace, Beebo, Six Apart, Orkut, Salesforce, LinkedIn, Friendster, Oracle, Engage, the list goes on (via TechCrunch).
Incredible. Perhaps even scary.