I did the day before yesterday and....I wish I hadn't. The phone crashed several times within the first hour and now, my e-mail is not functioning(even though I've checked settings multiple times).
I think that I'm going to end up spending a few hours to put a non-stock win rom and radio version on just so I can run android with no glitches.
I really wish that I had waited for the G2 to come out
Shop for accessories specifically compatible with the HTC HD2.