Technology: GSM
Announced Carrier: T-Mobile 
Announced Release Date: "mid-November"

The HD7 offers a 4.3" touchscreen which is the largest screen on a Windows Phone 7 device for the United States.  Other key features include a Qualcomm 1 GHz Snapdragon processor,  5MP camera with LED flash and HD video recorder, WiFi, Facebook and Twitter integration, and pre-loaded apps such as Netflix, and Xbox LIVE.

Direct from the T-Mobile press release below:

The HTC HD7 is also the first device to offer T-Mobile® Family Room™, a new application exclusively from T-Mobile that helps families keep in touch and manage their busy lives. Customers can write a note on a virtual chalkboard and add shared calendar events for their Family Room group to coordinate get-togethers. Sharing pictures and interacting is easy, with real-time notifications alerting users when any family member posts something for everyone to see.