Just picked up my HD7 today, at a Wal-Mart that serviced T-Mobile. If I hadn't asked specifically for it, would have never known it was there. The key to Windows Phone's success is going to be in how well they can get the salespeople at the outlets to sell them.
So far, the device is great and despite the "negative" reviews about the screen and camera, I love it. Except one thing.
It appears that T-Mobile/HTC has changed the Bing search engine in Internet Explorer to Google.