My daily device is the Dell Venue Pro Windows Phone 7 device and if you are a regular reader you know I think it is the best Windows Phone 7 device available right now. This device is for T-Mobile, but I just read over on Pocketnow.com that you can get it for AT&T. The AT&T model comes in 8GB, 16GB, and 32GB models while the T-Mobile one is available in 8GB and 16GB versions.
I personally just bought the cheapest 8GB model and turned it into a 32GB model with a simple microSD card swap and have gotten several emails from people asking for specifics who have done the same thing for less than buying a higher capacity model. Pricing for the AT&T models, with contract, is $99.99 for 8GB, $149.99 for 16GB, and $199.99 for 32GB with no-contract pricing of $449.99, $499.99, and $549.99, respectively.
The Dell Venue Pro is a slick piece of quality hardware with an excellent portrait QWERTY slider keyboard. NoDo is available on these smartphones and if the camera was better it would be a real killer Windows Phone 7 device.