Android 2.2 Froyo OTA Firmware update for Nexus One

Android 2.2 (Froyo) has been released for Nexus One via an over-the-air update. New features include:
+ Browser support for Flash
+ Support for Exchange in Calendar, plus Exchange security features
+ Speed boost for Browser and other apps
+ USB tethering and portable WiFi hotspot

You can download the latest build of FRF83 OTA Firmware update for Nexus One via Google (which only works for users currently on build FRF50).