The domain had expired, but has been fixed. It should be renewed for five years so this shouldn't be an issue again anytime soon.
Additionally, we've managed to gain control of our Top Mud Sites
listing, and it has been added to help vote along with our normal Mud Connector
listing. Unlike Mud connector, Top Mud Sites allows 2 votes a day, 12 hours apart. We ask that you try to vote on each of these sites everyday to help raise our visibility.