Can I keep my original unlimited data plan on the AT&T iPad 2?

Yes, if you are already signed up for an unlimited data plan AT&T will allow you to keep this plan with the iPad 2.

AT&T has confirmed those looking to upgrade their original AT&T iPad Wi-Fi + 3G will not have to switch to tiered data plans, as long as the unlimited data plan has been paid continuously month-to-month and is active when purchasing the iPad 2.