I thought that was actually one of Pixar's weakest movies so far... even A Bug's Life was better than that, and that's not one of my favorites.
If you ask me, the best Pixar movies that came out of the new millenium are Monster's, Inc., Finding Nemo, The Incredibles, and Ratatouille. Haven't seen WallE yet, but the way you guys are bashing it, I'm skeptical about seeing it.