Actually, I kinda like the idea, Kalah. It would make a lot less space considering some of the sign-up threads that appear in the Archive never actually became full-fledged RPGs, plus the sign-up thread does not show much of a purpose other than as the main storage space for character profiles.
Maybe to enhance this, you could edit the original post of each started RPG in the archive to include a link to their individual sign-up thread?
That's just my thought. :3