There's a new GameSpy LAN Master program on LANParty.com. This is a local master server you can run on your LAN that allows connected clients to easily find multiplier games on the LAN simply by using GameSpy. You can understand the usefulness of this if you've ever been to a large LAN party and tried to keep up with all the servers folks are launching (often running local webserver to provide server IPs). The initial version of the LAN Master includes support for QuakeWorld, Quake II, Q3Test, Half-Life, Kingpin, and TRIBES. More games may be added in the future.