HTC and AT&T have announced that the Windows Mobile 6 upgrade for the AT&T 8525 (also known as the HTC Hermes) will be available starting November 1. It must be November 1 somewhere in the world because the upgrade is already available.
Note: The process will take about 25 minutes. The ROM update will overwrite the current ROM image and to erase the partnership and all user data and programs on the device. Be sure to backup your data before doing the update.