Alrighty, since team leaders should be picked by now I'd like to address them specifically and say this: it is time to be a hard ass.
APPROVE ONLY THE BEST IDEAS; if you think something won't work, don't waste time on it, don't have your team members waste time on it, time is a very valuable commodity here.
DO NOT ACCEPT SUB-PAR WORK; accept only the best stuff from your team members, if they have to rework something or scrap something because it isn't right then they have to rework it or scrap it, EDN. Don't waste time or energy negotiating and don't stress about it if you hurt someones feelings, you are the one in charge.
BE CRITICAL; no, you don't need to be a jerk, just be difficult to please, find the flaws that are there and point them out to your artists, make them understand that you want the best that they can do and will settle for nothing less.
DO NOT CODDLE YOUR ARTISTS; they can handle it, if they can't they shouldn't be on your team.
BE ENTHUSIASTIC; yes, you can keep your team pumped and energized by appreciating the hard work that they put in.
BE RESPECTFUL; respect goes both ways, respect your team and they should respect you, if they don't you can kick their ass out.
YOU ARE THE BOSS; your word and opinion is the one that counts, make sure that your team knows that.
Finally; if you haven't yet, make the thread for your team.
Everyone is counting on you guys to make this project mind-breakingly awesome.
PS: There have been a few additions to some of the teams in the past few days. I expect teams to change and evolve as the project hums along, so check that news post if someone new shows up saying they are in the project and on your team.