Well, there's a few places to look for new games:
* You can always check the forums here as there's occasionally a post inviting new players to join up with a game that's starting.
* You can go to the links thread
here which shows off a few other forums to go match up with players for MP games.
* You can log on via IRC to irc.gamesurge.net and join the #dominions channel which is probably your best "real-time" bet for finding players for a game.
Also check occasionally at the Mosehansen servers as you can sometimes find open games which are actively inviting new players to join.