I went on the Walk in Walt's Footsteps tour about 10 days ago, and they said that the tour was going to change dramatically soon (by the end of March). They are adding Ipod's to the tour. I get the impression, that some of the tour will be in Walt's voice on the Ipod.
Also we were told by our tour guide, Kristen, that they are about to add a Segway tour, where you are taken on those Segways into DCA before it opens in the morning and you do a tour about that park riding the Segways, it includes breakfast.
It is modled after the "Around the World at Epcot" tour