The version of the HTC Magic approved by the FCC has support fort 1700MHz AWS spectrum. Since that's the same spectrum that T-Mobile uses for its 3G network, it is reasonable to assume that the Magic recently approved by the FCC is headed to T-Mobile USA. The FCC also confirms that the device will have Wi-Fi and Bluetooth, just as the Euro-version does.
What's not 100% confirmed is the name of the device. It looks identical to the Magic, but T-Mobile may sell it under the G2 name (it trademarked G2 back in October). Using the G2 name could help U.S. consumers identify with it more, as it is an obvious follow-up to the G1.
In the end, we have an HTC Android phone with T-Mobile's flavor of 3G. Perhaps HTC and T-Mobile will use next week's CTIA wireless trade show to make an official announcement.