Differentiating Projects as "Prospective", so they don't clutter your view of active development -- Possibility? Already Exist?

Is there a way to differentiate projects as "Prospective" instead of actively being developed? This way they won't clutter your view of active development ones?

I know I've already found myself putting prospective clients into my project-pier site, because its easier to manager _private_ milestone's of "write an estimate" -- "discuss needs with buyer" -- etc.

I think Project Pier is awesome, and it lends itself to use of a sort-of "staging" area for projects (when you've already got phone numbers, ideas, brainstorms, etc.)

-- Possibility? Already Exist?