Wondercon was this past weekend and some really cool WALL-E news came from it. Andrew Stanton made a presentation and they showed some new clips to the audience! I found this very descriptive article about it, the writer explains all the clips in pretty good detail. He also talks about whether the Pizza Planet truck will be in the movie 
Article here: http://www.slashfilm.com/2008/02/23/wondercon-wall-e-new-footage-digital-disney-3d-possibilities/

Article here: http://www.slashfilm.com/2008/02/23/wondercon-wall-e-new-footage-digital-disney-3d-possibilities/