In keeping with tradition, AT&T's Motorola Atrix HD came with a locked bootloader. While this didn't surprise anyone, that didn't diminish frustrations any. Luckily, Motorola hears and understand our frustrations and have chosen to do something about it. Just yesterday they announced they will be releasing a Developer Edition of the Atrix HD that will come with an unlocked bootloader.
We don't have any pricing or availability, but we will share those details as they emerge.
Source: AtrixForums via Engadget