Currently on 1.0.2 firmware, updating to 1.1.2 as soon as I get some time.
I use it in canada on Fido, I've used my rogers sim card on it as well, so it's fine with any GSM network.
They're going for $650 on ebay or craigslist, and at+t sells them for $400 with a 2 year plan....
I don't know how much the phone only, without a plan/contract, goes for in the states, so let me know that price, and I'll figure out a ballpark figure for you guys.