I am also happy to let you know that our partners at HTC have made available
new system images to upgrade your Android Dev Phone 1 (ADP1) to Android 1.5.
This new version (which is
only available for the ADP1) is based on the Cupcake
branch from the Android Open Source Project and corresponds to the system image
of the Android 1.5 SDK, release 1. If you have questions about the process of
updating your device, you can ask the mailing list that we’ve set up.