Is the New Ipad tablet web+3G model compatible with any phone company?

I am getting an ipad, but i am not sure to get the basic wifi or the wifi+3G. My phone line is under Sprint.

The AT&T is an option offered, but to my understanding you can get your service plan with any carrier. Because of the issues surrounding the proprietorial service plan on the iphone, Apple seems to have decided to lose that on the iPad in order to get more sales.