Here's the latest I've heard on when some of your favorite hot reads will be out on the big screen!
2/14/08: The Spiderwick Chronicles by Tony DiTerlizzi, Holly Black
3/14/08: Horton Hears a Who! by Dr. Seuss
5/16/08: Prince Caspian by C.S. Lewis
10/08 - City of Ember by Jeanne DuPrau
11/21/08: Harry Potter and the Half Blood Prince by J.K. Rowling
12/08 - Twilight by Stephanie Meyer
Sometime in '08: Maximum Ride: The Angel Experiment by James Patterson
Sometime in '08: Cirque du Freak by Darran Shan
Sometime in '08: Eloise in Paris by Kay Thompson
1/09: Inkheart by Cornelia Funke
2/6/09: Coraline by Neil Gaiman
11/6/09: Fantastic Mr. Fox by Roald Dahl
11/09: The Lightning Thief by Rick Riordan
A Great and Terrible Beauty has also been announced, but as of yet has
no release date.