1 CentOS 4.3 Linux Server, 1 Home Built Media Center PC connected wirelessly in the living room to a Netgear Wireless Access Point. D-Link 10/100 Network Switch connected to the Linux server with DHCP disabled (Linux provides me with DHCP and intrusion prevention). 1 Shuttle XPC with PCLinuxOS and WinXP Professional dual boot connected to the D-Link switch.
1 SuSe 10.1 Computer connected wirelessly to the Wireless Access Point.
On the access point...I have WEP encryption and it's hard wired into the Linux box with a wireless DMZ (so I can monitor packets separate from the hardline wireless network).
Kinda complicated, yet simple