AT&T makes sweeping changes to data plans, iPhone tethering coming at OS 4 launch -- Engadget
This includes the iPhone AND iPad 3G.
So basically, they go from unlimited for $30, to 2GB(!) cap for $25. Gee, thanks douchebags.
Now I definitely know I'm keep my Droid and just getting a wifi-only iPad. Fuck AT&T. With a cactus.