Here's my goal: simply to share my MBPs wireless connection to my Xbox over ethernet. Sounds simple enough and I know it should be possible but it isn't working. I have internet sharing on to go from the airport to ethernet but when I try to connect the xbox it can't even find a network or get an IP address. I would assume I just need to get my computer to act as a host of some kind and assign it an IP address, but I can't figure out how to get it to do that. Any ideas?