While we've already stared down the specifications, AT&T's announced that it will bring Motorola's big and skinny slab to the US later this month, while Bell will do the honors in Canada "this summer." Priced at $99, the Atrix HD will tie together LTE connectivity with a 4.5-inch 720p display, available in both Modern White and Titanium colors. Better still, it's all arriving later this week, on July 15. If you're thinking about becoming an early adopter then you'll want to move quickly, as a free Vehicle Dock will ship with each one for a "limited time", designed to work perfectly with the included Smart Actions. Finally, this is the first phone to feature Motorola's "circle widget" on the home screen, designed to take owners directly to their AT&T account info, displaying data usage, battery status and more. Check after the break for a quick video walkthrough from AT&T plus a press release with all of the specs and details.