AT&T is providing an updated ROM for their 8525 (HTC TyTN) owners that brings the devices up to Windows Mobile 6' rel='nofollow' class='nuwiki_new_link'>Windows Mobile 6.

• This ROM is available from November 1, 2007 to February 1, 2008. After this date, the ROM will be removed from the website and will no longer be available for distribution.
• This ROM update is intended for the AT&T 8525 only and users should not load or attempt to load this version on any other device as it may cause serious issues/damage.
• At this time, Good Mobile Messaging is not supported on the AT&T 8525 with Windows Mobile 6' rel='nofollow' class='nuwiki_new_link'>Windows Mobile 6. It is recommended that Good Mobile Messaging users not upgrade their device’s firmware at this time. Please note that once the latest firmware has been loaded, it can not be undone.
• HTC strongly suggests that users create a back up copy of this ROM and keep it in a secure place as all new and refurbished 8525 devices (including those received via Warranty Exchange) will come loaded with Windows Mobile 5 rather than Windows Mobile 6' rel='nofollow' class='nuwiki_new_link'>Windows Mobile 6.

So if you intend to get this, better get it while it lasts. Its kind of odd that they aren't going to try and move everyone to it, leaving them to have to support two different levels of the device. You can download the update HERE.