it's not an Apple's to apples comparison. I can say that the HD2 matches the fluidity of the iPhone experience. In some ways it's worse than the iPhone but in other ways it's better. I personally love the glanceablity of the HTC Sense UI to quickly scan email, stocks, weather and Twitter.
AS MSFT hasn't talke about Win Mo 7 or whatever comes next, no way to know. But in general, buy a phone for what it can do for you today, not whether you can upgrade it tomorrow or you'll wait forever the next big thing
i've been using mine for just over a week now - really surprising how good the HD 2 is! The screen is big - i find it difficult to use in one hand (small hands..) , but it's just so quick and responsive.. and after using HD 2 no other Windows touch screen will feel the same
i've being playing with one of these too, albeit only briefly. It's an ugly girl or boy wearing stunning make-up. And as such it's very attractive. But has much as HTC has skillfuly applies their Max Factor magic their are going to be times when you are exposed to the horror that is Windows Mobile (sorry, Windows Phone) lurking underneath all that slap. If the HD2 were running Android I would have already run away with it forever to another country with no phone-stealing extradition treaty.
You can buy one on expansys-usa.com/ but it is the Euro/World model. As Gartenburg has stated, it won't work on AT&T's 3G frequencies but will do the 2.5G and that can be fast. If you absolutely need 3G, don't get it. I myself am looking at one a friend owns next week for a few hours but I feel I will buy one based on the 5 minutes I got with it this week.
I've had my HD2 for 6 days now and am very happy so far. The only part of WinMo 6.5 that you ever see is the Program screen/application launcher (i.e. the thing that once-upon-a-time was going to have the honeycomb interface) and I find it perfectly fine to use - nice big buttons.
The marketplace app (is that considered part of the OS??) is functional without being spectacular.
The rest of the time its all HTC Sense UI which is simple gorgeous. In fact nearly all of the good things about this phone can be attributed to the phone manufacturer which (IMO) is a good thing. I feel there's too much hot air that gets blown about whilst talking about OSs.
The hardware is what really "makes" this phone though. The massive screen is the killer part and I've seen a few iPhone owners look a bit miffed when I lay it alongside their treasured devices. HD2 is definitely a head turner.
Of course the biggest thing that its missing in comparison to the iPhone is the fact that the iPhone is also an iPod, so no decent media management here and absolutely zero podcasting support (which, for me, is a big thing). Of course I knew all this when I bought it so I shouldn't really complain.
I've been tweeting my experiences (both good and bad) using hash tag #hd2experience if anyone is interested.
The device comes with two Twitter apps correct? How do they each perform? Can you upload pictures and videos (to Twitpic or Twitvid, respectively. Or other hosts?)? Do they support lists and the new retweet features recently added to Twitter?