How many unfinished/unreleased maps do you have lying around? I'm sure there's quite a few for each one of us.
If you no longer have the energy and/or will to finish them, why not share them online so that some other mapper can have a look - and possibly finish them??
It might be a good idea to have one central "repository" type place for ease of access, and also to encourage others into not condemning their unfinished work to rotting on their hard drives.