In a perfect world, we'd one day all be guzzling from an endless font of virtually free bandwidth, streaming 1080p video straight to our WXGA handsets with stereo Bluetooth beamed straight to implants in our ear canals. Turning our attention back to reality for a moment, though, and the situation is a little more bleak: carriers are plagued with crappy, overloaded networks, backhaul issues, and a 4G rollout that could easily span a decade. To that end, caps are still firmly in place on US carriers' so-called "unlimited" laptop data plans, and overage rates make the occasional slip-up nasty enough to bankrupt you if you're not offered clemency from customer service. The good news is that AT&T's data overage rates have dropped significantly as of November 6, going from 49 cents per megabyte to 5 cents on the $60 5GB plan and 10 cents on the (nearly useless) $40 200MB plan. That still means you're paying over $50 for each gigabyte of overage -- but as AT&T points out, it's a hell of a lot better than the $500 you were paying before.