you're going to have to wait until after the 2006 AWS spectrum auction by the FCC. As it stands, TMobile owns no 3g spectrum, so no HSDPA at the moment.

Pictor said:
Any word on HSDPA for T-Mobile? And with it phones that support it?

You're gonna have to wait quite a while for that. Before T-Mo get to deploy HSPDA, they will have to deploy UMTS (which is no-where near)
Probably mid-end 2008 (UMTS)
Oh, I really doubt T-Mo will deploy UMTS and HSPDA at the same time. (as Cingular is doing right now) It's a loooooooong wait. sorry! 😢