Currently the only way to have character submissions available is all open. It would be nice to have the ability to open X number of slots, and when the narrator accepts a character, decriment the number of open slots. It would be even nicer if you could open X number of slots of type Y, so a narrator can specify 1 magic user, 2 detectives, etc so both potential applicants see what's open and the narrator isn't flooded with ten apps when they want to have three slots.