[pg2k3]

Im not too knowledgeable about the world of macs but I can tell you that WMWifi router uses Ad-Hoc instead of Infrastructure (Used by most true Access Points). Ad-Hoc is not primarily intended for internet use as it does not support default gateways and its meant to connect a device to another wireless device without a router to intermediate. If macs do not have any form of Internet Connection Sharing like microsoft does then that would explain alot as well. I could be wrong but thats my theory.