yea, but in the past the cat 5 has worked great, as long as we manage to keep it out of the way (hide it) no one bothers with it, and we do it late at night, and clean it up before anyone is the wiser. That way not everyone has to have a wireless adapter. right now I'm experimenting with a Yagi antenna built from a Pringle's can to increase the gain by 12 DB's or more. So, if we wanted to play against other people in the other hotels...we could. I'm even testing passive repeaters to get the signal around corners, but I doubt I'll lug everything down to Atlanta, I may bring two Yagi's, so if I had to I could set up a long range wireless link to another hotel. We'll see, I'll bring enough gear to get up and running, I'm sure others will bring gear, and I'm sure there will be some LAN gaming. Idk, maybe if you interested in building your own Pringle's can Yagi antenna, scope out this link.
http://www.oreillynet.com/cs/weblog/view/wlg/448