Google announced today the support of 2.o in the SDK and there’s plenty for developers to be excited about: great control over bluetooth and sync plus contact integration that will really pull the vanilla Android experience together, for starters. A single inbox, multiple access points for your contacts, and the potential for bluetooth gaming with chat and social features are just the beginning. Éclair is turning out to be quite a tasty treat. Oh, did I mention HTML 5? That paves the way for Google Wave, folks!
Also see PCWorld’s Complete Primer for 2.0.