Work began on Projectile Swapper about two days ago. I believe it will be done (to satisfaction, maybe not completely done) in about two more days.
After the first release, I'll likely drop it (for a few weeks, anyways) in favor of other projects. Then I'll probably come back, add some new stuff and fix bugs and whatnot. Unless I get major outcry, then I'll continue with it for awhile yet.
So, until the release...