I think you can. We have and AT&T thing where two computers can be on the internet at the same time, so I bet you can do the same thing with one computer and a Xbox. (I do not know how much the AT&T thing is costing us right now.) The AT&T thing is a little box we put on top of our computer (not the moniter) and we even get pretty fast internet. Fast enough for online games. (Just so you know, I have never played and online games with Xbox, Xbox 360, PS3, or etc. Only online computer games.) That is what I think.
(I love my Smileys!) XD
