At one point when I happened to be re-reading Scrapheap City Shuffle, I had an interesting notion. One guy in a base surrounded by loads of possibly useful junk fighting off raiders, that sounds like the makings of a tower defense game. :) Spend x amount of hours to scavenge for parts and depending on what you get, create some automated turrets to help with defense for when the raider attack waves start. I'd give a try at making it myself, if you disregard the fact that I know diddly about programming in flash.
Just figured I'd throw it out there. Who knows? Maybe somebody will actually make it.
(if this is in the wrong spot, Sorry!)