I'm actually all for a Plot Sections. Set it up to have sub sections where you can store updates detail sheets for your characters if you want, as well as discuss story ideas with other people before you launch them.
I've tried to set up Storyline teams before; basically a bunch of a NON-STAFF players that get together and plot out the major events and whatnot, and just run the ideas past an admin to make sure it doesn't contradict/violate any rules/history set up/etc too badly. If ya'll wanna try that, I can set it up pretty quickly.
As for a 'Wanted' section; I agree with that seeming really bounty-ish, and while we've used a job/bounty system before when we had a different Avatar site, it gets kinda boring/redundant after a while because you run out of new stuff to do after a while when new ideas aren't being thrown out. As for using it to find people to help out with specific character/NPCs you need for your personal growth; I can throw that in as part of a Plot area; and you can basically use it that way; so that it's obvious that;s it's like the Wanted ads in a paper (or Craigslist for you whippersnappers), and not a Mission/Bounty listing.
Sound good?