As a fun aside, I've seen this morning that the update brings back creeper explosions! They don't do any damage to the ground, just like before, but you'll now get to see and hear them blow up as it happens. That means no more creepers vanishing into thin air!
External: Server back online, Update by Dr. Cossack
The server is now back online! We're still running on v1.1 for the time being, but this maintenance update allowed me to refresh the list of plugins and clean the overworld map's files. This will make the transition to 1.2 much easier.
While on the subject of 1.2, we'll be moving to it as soon as possible. I'm aiming for the first Beta Bukkit version available, which I expect to see available in the next few days.