Here are some photo's of Segway's new RMP, debuting at RoboBusiness - there isn't any information available about it at this time other than it "might" cost up to $50k and it can move in any direction (omnidirectional wheels, but the term was hyperdirectional?).
It uses the same parts that a Segway uses but just doubled, it can haul up to 400 lbs. The engineer was going to load the firmware on for demos later, but I took some video of video they had on a screen, it's creepy cool for sure.
http://blog.makezine.com/archive/2008/04/segways_new_rmp.html