I have a long drive to work. Some of the ideas I've come up with on my drive:
1: Burnt Stars: a Star Wars RPG set in the "far future" of the Star Wars universe. A mixture of sword-and-sorcery and Star Wars. Barbarians with lightsabers. Sith sorcerers.
2: Gutter Memory: a game of Wraith: the Oblivion. Spirits of the homeless overwhelm the streets of Newark, NJ in 1978.
3: Place of Forgetting: story for the 7th Sea RPG. Political enemies are held in a remote prison, on an island far from civilization. They fight to survive.