As promised, the Acer Iconia Tab A501 is hitting AT&T just before summer draws to an official close. The carrier just announced it'll start selling the 16GB model next Sunday, September 18th for $480 -- or $330 with a two-year contract. When we first heard about this way back in March, we knew it would be a "4G" device, and today AT&T clarified that this means HSPA+, not LTE, so sorry to burst anyone's bubble. Even so, five months after the A500 went on sale it remains one of a select few slates with a full-sized USB port, so there's that to consider if you're still on the fence about getting a tablet. As planned, it'll ship with Android 3.0, and an Acer rep confirms 3.1 is coming via an over-the-air update, though she couldn't say when, exactly, that'll happen. You can sign up for a monthly plan, if you so choose, though you can also pay as you go, with $15 getting you 250MB and $25 expanding your allowance to 2GB. Customers who commit to two-year agreements will have the same choices, to be honest, except they'll also have to contend with overage fees -- $10 per gigabyte or $15 per 250MB, depending on the plan.