This just came out in the AP newsletter:
Leave it to your Pixar friends to turn DCA into a giant playground. Beginning Spring 2008, "Pixar Play Parade" brings together characters from all eight Disney-Pixar films for a colorful, imagination filled salute to playtime. This new parade features, acrobatics, bungees, playful choreography, interactive surprises, and even water effects, all set to a dynamic soundtrack of orginial tunes. Be sure to get a front row spot for the fun!
There was even a picture of concept art included: