You know, I figured I'd list my ideas for video game conversions too, just for fun
1: Shakespere's Julius Caesar. Come on, am I the only one who loves this play? It's got one of the best monologues in theater history, and it certainly could make for a great game. The game, like the play, could take place in two parts, with the first casting you as a member of the senate in a Heavy Rain style choice centered game, and the second could be a strategy game that changes based on your decisions in the first half of the game! Make it happen!
2: Not so much a specific story as an author, but Kurt Vonnegut's writing is very unique. I'd love to see a game inspired by his writing. It could be bat crap crazy and still be true to it's souce. Seriously, with that as your base, you can go just about anywhere.
3: Ok, here's my "lowbrow" pick: I'd like to see a game based on Stephen King's "The Tommyknockers." Think Deadly Premonition / Silent Hill hybrid. Focus more on the horror and less on the campyness. This is probably my favorite Stephen King novel, mostly because the source of the terror is actually downright freaky in concept. I'd love to see this happen.