Disney Lost and Found: Exploring the Hidden Artwork from Never-Produced Animation 
Just got this title in today. It looks stunning and absolutely amazing. Full of concept art, sketches and paintings of animation and characters never produced.
Don’t forget to stop by our site and leave some Disney Geek love!
http://www.imaginerding.com
Ooooh, I must wait for the review though.
Shameless plug–I reviewed it over at 2719 Hyperion:
http://www.2719hyperion.com/2008/06/disney-lost-and-found.html
I so want this book!