I love the nonfiction picture book Nic Bishop's Frogs selection of course...in fact used it in a catalog class situation last week. It is a perfect example of why kids can't get enough visually-stimulating science books! Here is a podcast with the author of the winning book from the Just One More Book site!
The only other winner I am familiar with enough to even mention knowing is the haunting, somewhat disturbing, YA novel Hunger Games. So much to think about on many levels.
Information about past winners can be found here for 2006 and here for 2007.
Happy Reading!