My MacBook's wireless has failed at the University of Texas at Austin. They have this system in which you need to connect to a "guest" service and then set up a "restricted" service if you are a student. After a few months, the wireless just completely shut down. When I try to rejoin the server, it keeps saying that it cannot find an IP address. The ethernet still works, thankfully. However, I found that the wireless will work XP via Boot Camp, but not through Leopard. The IT squad here is baffled. Any ideas on how to fix this? I don't really like using Windows for anything other than gaming.