Huawei just announced the Ascend W1 Windows Phone 8. It's a midrange device that's aimed at Nokia 820 and the HTC Windows Phone 8s.
It's a HSPA+ device with a dual-core 1.2Ghz Qualcomm Snapdragon 8230 processor. The 820's has a similar processor that's clocked at 1.5Ghz while the 8s' runs at 1Ghz. You also get 512MB of RAM and a 800x480 display - just like the 820 and 8s.
There's a 5 megapixel camera on the back and a VGA front-facing camera. There's 4GB of storage which can be expanded with MicroSD cards. 802.11 abgn WiFi and considering it's specs, it's got a relatively large 1950mAh battery.
It will be available blue, red, black and white though whether it gets picked up here and in what colour remains to be seen.
There are very few 2G-only areas left in AT&T's native footprint, so the lack of a 2G band will probably not have much impact on your ability to use the device, unless you happen to find yourself in...