Ok, a few more comments now that I've read the rest of the thread:
Regarding the trailer, I think it's wonderful that Pixar doesn't ruin their films for you by showing you the funniest, most visually stunning moments from them. I love it that they actually go through the extra trouble to produce what is essentially a separate short film to let you get an idea what the movie will be like without showing it to you. I wish every studio would do this.
Another thing that I really like about how Pixar does business is that they create something new rather than just recycing something old to make money. Even with Toy Story 2, they came up with a solid movie that completely stands on its own. I felt like the storyline for Ratatouille was really original.
I really enjoyed all of the various "incarnations" of Gusteau, and the nod to 2-D animation when the illustration in the cookbook first starts talking to Remy. Also loved the moment where all of the various cardboard-cutout Gusteaus are all talking. Too funny.
For me too, the pivotal moment of the film is when Anton Ego is magically transported to a tender moment in his childhood after one bite of ratatouille. Remy has truly triumphed when he is able to win over this crusty food critic who wants to hate the restaurant so badly. All at the same time, I was laughing, clapping and crying. They really nailed it with this scene.