After his death from cancer, Michael Crichton’s assistant found a completed manuscript which is to be published in November (you can preorder Pirate Latitudes: A Novel from Amazon). Spielberg will be adapting the book for film:

DreamWorks Studios has acquired the film rights to the action-adventure novel “Pirate Latitudes,” which Crichton wrote just before his death in November. Spielberg, who directed Koepp’s adaptations of Crichton’s “Jurassic Park” and “The Lost World,” will produce the film and possibly direct.
Koepp has signed on to adapt.
[…]
“Latitudes,” which takes place in 1665, is about a daring plan to infiltrate Port Royal, one of the world’s richest and most notorious cities, and raid a Spanish galleon filled with treasure. HarperCollins will publish the novel, which Crichton’s assistant found in a completed manuscript after his death, on November 24.

There’s another novel, a techno-thriller, that will be published in 2010 (according to Wikipedia).
BTW, I’m currently reading Timeline: A Novel which is pretty good so far.