I'm only hosting one game, but I have a dedicated machine for hosting tcp/ip games.
It's not as automated as llamaserver, but it's also not PBEM. The server itself probably goes down for an average of an hour a month, so it's pretty reliable.
So if anyone wants to organize any games to be hosted at xavier.myftp.org just shoot me a PM with the game settings and number of players and I'll send you back the port # I've put it on.