I don't see why Verizon wouldn't support an update, after they got their hands on it and did their "magic". That being said WM6 really isn't hobbled by Verizon right now. You can do pretty much anything you want with the OS including isntalling software, changing settings, etc. With the new "any phone on our network" coming up it wouldn't make a difference anyway.

Here are my 2 pennies.