NetGear router: WNR854T
NetGear USB wireless adapter = WG111
The wireless adapter has been tested on the known working machines, and can be easily swapped out.
3 LAN connected desktops
1 wireless connected desktop (this system was used to prove the USB device works properly)
2 wireless connected laptops
3 wireless connected but limited connectivity desktops. (1 homemade ASUS P5LD2 system, 2 Sony VAIO systems).
There are 50 DHCP addresses available in the range.