I guess we'll find out whether open APIs matter to people - Google has announced that everyone but Facebook is onboard with their new "Open Social" system. Via TechCrunch:

MySpace and Six Apart will announce that they are joining Google’s OpenSocial initiative. Silicon Alley Insider reported the MySpace rumor earlier today. We’ve confirmed that from an independent source, as well as the fact that Six Apart is joining. Per the update below, Google has also confirmed Bebo is joining.

That's fairly big, because it means that one API now gives you "widget" access to multiple systems. Facebook had all the momentum right through yesterday, but I have to think that this takes some of the wind out of their sails. On the other hand, I don't know that I'm about to move the Industry Misinterpretations Group off Facebook - and the various widgets on these systems are mostly useless. The big thing is "where the people are" - so the question is, will this drive any movement off Facebook? If it does, they'll look back wistfully at that Yahoo offer they turned down.

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