There's nothing groundbreaking in here, but AT&T has just thrown up a good one-page summary of how this whole WWAN thing is going to go down for new iPad 3G owners come this Friday. As we've already known, you'll be paying $14.99 for 250MB or $29.99 for unlimited (yes, truly unlimited with no 5GB cap) data in addition to free access to AT&T's comprehensive collection of WiFi hotspots -- perhaps the more interesting bits, though, have to do with plan management on the 250MB setup. Basically, you'll get a warning on your iPad when you get to 20 percent of your allowance remaining, then
