HTC just broke the horrible news via twitter:
sad news, US. we looked into it- by the time we could bring Touch HD to the states, it would be old news. we do have other cool stuff coming
In other words, the Touch HD with its gigantic screen, 3.5 mm headset jack, and general iPhone-challenging form factor is going to be import-only for the US and, on top of that, it's likely never to see the 3G bands used by AT&T. The dream, our friends, is officially dead on this side of the pond. At least the import of the non-3G-compatible version will be legal by dint of the recent FCC approval. HTC's grand tradition of release CDMA versions of most of their stuff here also has hit quite the speedbump, too.
...Of course, the 'other cool stuff' intrigues us, but it's not much consolation just now. Meanwhile, you'll have to excuse us while we wither under the jibes of our iPhone-toting friends in the US.
(side note: comments a little broken right now, if you head to the forums and log in, you'll be able to comment. Alternately, just go here. Update: Comments Fixed)