Well, Netgear has an 802.11t router out now, but I think you only get the 112mbit if you are less than 6 feet away from the WAP.
My suggestion is stick to 802.11g, and make sure the WAP and cards support WPA encryption.
Any particular reason you are thinking about wireless? I would only suggest it if you have a laptop or conditions where running cable isn't an option, otherwise stick to CAT5/6. More secure/reliable, and much cheaper.