I don't have any suggestions, not being a hardware guru. But I do have a gotcha - if you happen to have an Apple system with an Airport Extreme wireless access card, stay away from Linksys wifi hardware. Apparently there is some kind of incompatability between the two and they just don't talk to each other. I ran into the problem when staying in a hotel that had one; I could join the wireless network but had no actually connection to the Internet. Mike subsequently found the problem documented somewhere in the Apple.com discussion boards.
