I think a TOS for a site like this ought to encourage people to argue and disagree but make it clear that there will be certain rules of decorum. For example, no personal insults or name-calling. (Back in the BBS/listserv days we used to call that "flaming" -- I don't know if that's still what it's called.)
Also, there needs to be a no-child-porn, no illegal content kind of statement and a no harassment and no spamming rule.
I'd like to make it clear that while sexuality intersects with all kinds of other things, the main focus of the site is sex and sexuality, so content that really strays far from that theme might be moved/deleted/what-have-you.
How should we encourage people to get involved as members and moderators?
And as for a FAQ, we'll definitely need some info about using different parts of the site, and about how drupal works. The most helpful thing here would be if we each kept track of whatever problems we've run into. (And if we've solved them, then the solutions as well!)
...because public space really matters!
Elizabeth