So I just returned from the Microsoft Worldwide Partner Conference where I talked to the Windows Mobile Team. I went by their booth three times and talked to three different people. The three different answers that I got to my 6.1 update question:

First day: Oh, sure: that's the Samsung i760. The 6.1 update was just made available. Go check the website for the download. (I checked, it wasn't available)

Second day: Depends on the carrier. Moto has flashed some of the Microsoft team's personal devices on request. Don't know about Verizon.

Third day: Found a Microsoft Windows Mobile team member that actually uses the i760 as his personal phone. (Now we are getting somewhere!) He said that he'd heard an update was in testing at Verizon but had no other info.