The short little ride at innoventions was pretty popular too. We waited in line for that as long as we did for some of the attractions. Unfortunately the segways were gone last time we went.
I heard DL ran into insurance complications with the DCA thing. Doesn't make a whole lot of sense to me since they found a way to do the tours in FL., but I guess stranger things have happened.
Too bad, we would have liked to try the segway tour.