There are fortunes to be made in teaching photography skill to those considering leaking tech info online. The photo you see below is almost pure gibberish, but according to the person that leaked the shot what you are looking at is the confirmation of the Nokia Sea Ray smartphone on AT&T is in carrier testing. This would be the First Windows Phone 7 handset from Nokia.
The line of the page with the brownish line under it apparently reads "1211 mycingular.net Mozilla/5.0 (compatible; MSIE 9.0; Windows Phone OS 7.5; Trident/5.0; IEMobile/9.0; Nokia; SeaRay)." The listing showing Cingular and HSDPA band support doesn't mean the device will come to AT&T, but it would be a safe guess me thinks.
The image seems to prove the device is at least in carrier testing. I hope the device works well if it is in fact coming to AT&T. At this point with Microsoft making more off licensing Android than WP7 even if the Mango update proves as unpopular as the current version Microsoft will still be looking pretty good in the mobile realm.