Verizon has released a Windows Mobile 6.1 Professional upgrade for the Verizon XV6800. If that is not enough good news, the latest ROM also adds EVDO Rev.A support as well as threaded SMS, an updated MMS client, improved battery life and more.
The upgrade is a free download.
Note: The update will replace the current ROM image and will erase partnership and all user data and programs on your device. Be sure to back everything up before you start.