I don't really care about posts per day, as long as people post with some degree of regularity I'd prefer quality over quantity. I think it'd be pretty foolish to set some kind of quota for people to fill.
You can do multiple roles if you really want to, just avoid godmodding.
- - - Updated - - -
Given the high amount of interest (a pleasant surprise, I must say), I think I'll go ahead and put up an OOC soon.