Hello guys,

Its confirmed by google that current leaked release of froyo a.k.a android 2.2 is not final release. Everybody who has installed it automatically/manually on their devices, will still be getting final release OTA upgrade. Release going to be available on OTA in next couple of weeks. And google is working hard to give it ASAP.

Source:

http://www.google.com/support/forum/p/android/thread?hl=en&tid=488da0ef21660d13 - Check the best answer.(Ray Guy)

http://www.slashgear.com/android-2-2-froyo-on-nexus-ones-right-now-isnt-the-official-release-2587038/