Hmm... well, 'Open' would possibly mean you're [i]allowing[/i] new RPers. 'Recruiting' or 'Applications' would mean you're specifically crying out for more people. I've had plenty of RPs where I would like to advertise I need a lot of people, then slow down the pace with a simple "Okay folks, thanks for the help! We're still accepting though, but no need to go advertising the fact." sort of thing.

Off Topic: YOU FORGOT THE PAGECLAIM! NOoOoOOooOO!