One of the reasons that MO (also SO) was able to grow so well in the early days is that it had a small dedicated group of people who guided the site through its early stages and kept things on topic. I think that we need a moderation team here ASAP. I have a few nominees in mind (as do some others from MO). The longer MU takes to get a team together, the more momentum it will lose once the public beta begins.
Optimally, MU should have a moderation team in place by the public beta. As people who have committed to this site, it seems that we should be in charge of electing the first team of moderators.
Note: I have no intention of becoming a moderator here, so don't worry. Like Noah, you can expect me to fade away once MU has been stabilized.
Note 2: Yes, the title is a shameless plug for Civ4.
Edit: Since we've got some nominees already, I'll start listing the ones who have accepted their nominations:
Tom Stephens (nominated by Harry Gindi)
Akhil Mathew (nominated by Harry Gindi)
Katie Banks (nominated by Tom Stephens)
Bryan Bischof (nominated by Katie Banks)
Kaestur Hakarl (nominated by Isaac)
I think we can all agree that self-nominations should be prohibited.