When I use the onboard NIC connection, It works pretty well. When I use the wireless PCI card, I cann't see the other computer on the router. I have the wireless set to obtain an IP. When I run IPConfig with the wireless, I see an IP address of 169.254.110.68 and a subnet of 255.255.0.0. There is no DNS showing.
When I use a static IP with the wireless (different number from the NIC), I get the same problem.
Also, I cannot get Internet sharing to work on anything (using a 56K modem on one machine). It always tells me 192.168.0.1 is in use when I try to set IC on although no nics are using it.