HTC has released an update to the Android OS for the ADP (Android Developer Phone). The upgrade takes the Dev phone to Android 1.6 (Donut) and allows developers to get to grips with the new OS release before it’s pushed to the official manufacturers.
More information can be found on the HTC Developer site.
Enomther is already working on (or may have released by the time you read this) an update to his TheOfficial ADP series of ROM’s. You can check for the release on Enomther’s AndroidStory Developer Homepage.