wlm2, while you are coming up with answers, I have thought of a topology that uses your existing equipment, and permits protection of your Windows laptop by OpenBSD and the ALIX device... including WiFi.
Code:
{Internet} -- [ISP equipment] -- [ALIX] -- [Linksys router's switch] -- [Windows laptop]
The connection between your ISP's equipment and the ALIX is a point-to-point Ethernet connection; the ISP's equipment may resolve the transmit/receive crossover; if not, a crossover cable is needed.
The connection between the ALIX and the Linksys box is another point-to-point cable, connected to one of the router's 4-port switch connections.
The connection between the Linksys box and the laptop is another of the router's 4-port switch connections.
DHCP services can be provided by the Linksys box to all devices, since you are unable to find and eliminate syntax errors in your dhcpd configuration file.
The Linksys device acts as an Ethernet switch and WiFi access point bridge. It is no longer used as a router.