Looking back, I can't believe this thread didn't get bigger than it is...The War of the Worlds, Revenge of the Sith, and Batman Begins threads are enormous.
Anyway, I am almost done with all the existing Sin City novels. I now own the first six books, and just ordered the seventh, Sin City: Hell and Back. Thus far, The Hard Goodbye, and Family Values are my favorite. You should seriously pick them up if you liked the movie.
And just as a little update...Not only does Sin City come out on DVD on August 16th...It supposedly comes out on UMD as well.
The Sin City sequel will involve Sin City: A Dame to Kill For, the second Sin City book, which stars Dwight, but before Big Fat Kill. To Sin City experts...Think they'll still use Clive Owen in the second film, despite Dwight looking different?
And, Frank Miller is currently working on a bunch of Sin City short stories. It's possible that they will be compiled, and released as a book together, like Sin City: Booze, Broads and Bullets.