I don't know about Live! but yes you can with XBConnect. Assuming you don't want to purchase a WET11, you can use a CAT5 cable and hook it up to your ethernet port/card on your laptop. On XBConnect however, you need XBC 3.1 to get this setup to work, however. My cousin tried getting Halo working with 2.3 and it never worked, and no one else got it to work either according to him. The only main problem is latency - if you're going to be hosting a huge game with a huge amount of players over wireless, FORGET ABOUT IT. My cousins works fine with one player but if he hosts a game where he has 3-4 people it lags very badly.