So I just moved into an apartment directly opposite one of my University's gyms and dorms. From the front room, which faces the gym, my housemate's iBook can pick up the University's wireless signal, although I can't on my Powerbook from the back room. Is there any device we could buy that would pick up the University's wireless, and rebroadcast it, so that we could get wireless all over the house, and not pay for it (apart from the 40K we pay the university)?