http://www.engadget.com/2010/05/21/htc-vision-finally-bringing-high-end-qwerty-to-android/

http://mobile.engadget.com/2010/05/20/htc-glacier-led-and-vision-among-next-round-of-vague-codenames/

"Vision is listed with "TMO" next to it, suggesting it's coming to
T-Mobile -- though we've no idea whether that's referring T-Mobile's
European or American branch"