Online Game Cluster
axehind writes "Carlo Daffara posted to the openMosix mailing list about his game cluster. It's a 6 node cluster using Athlon XP cpus and running linux & openmosix (with some qdisc trickery) for the OS. It is used to host approximately 1000 users playing online games, like Jedi Knight and Quake III. Here's a link (italian) to the pictures."
That same cluster spec running 1 instance of a game for someone to play on :).
Someday I hope for clustering software to be to the point where when someone at a LAN party goes to sleep, their processing power can be used to help other machines.