At&t just announced that the aluminum clad Lumia 925 will be available on the network starting September 13th, though they will start taking pre-orders tomorrow Aug. 28th.
The Lumia 925 is currently being sold through T-Mobile and At&t being the only US carrier with the most amount of Windows Phone sales (specifically Lumias), it is a very welcome addition to their already star-studded line up of Lumia devices (which include from the Lumia 900, 920, 820 and 1020 and the yet to be announced 1520)
At&t Lumia 925 will come in a unique black version not common with T-Mobile's versions.
The Lumia 925 is a 4.5inch puremotion HD+ display screen, with 1.5GHz dual-core snapdragon CPU, 4G LTE network, 8.7MP Pureview camera with OIS and low light capabilities, 1gb RAM, with internal storage of 16GB.
It will retail for $99 on a 2yr contract
You can read more on the Press release page