We told you how to get the Android 2.2 firmware update on your Nexus One long ago . Now the final , official , bulletproof FroYo build has been released by Google into the wild and numerous users are reporting receiving the OTA upgrade. We did not receive any update over the air so we decided to take the manual route !Download Links
FRF85B full update http://android.clients.google.com/packages/passion/signed-passion-ota-42745.dc39ca1f.zip around 84 MB ( we used this update to move from FRF50 to FRF85B ) Universal update
FRF85B update from EPE54B http://android.clients.google.com/packages/passion/signed-passion-FRF85B-from-EPE54B.75b107d6.zip around 45MB ( for AT&T/Rogers/Telus )
FRF85B upgrade from FRF83 http://android.clients.google.com/packages/passion/signed-passion-FRF85B-from-FRF83.f62ffd2b.zip
Note : these work on only non-rooted handsets
via Google