Looked long and hard for a place in Boston to rent Segways with little luck... Dealers I contacted couldn't have been less helpful. Finally found Kathryn Stewart of Seacoast Fun Rides in New Hampshire, who was able to deliver to Boston for a very modest fee. Wonderful service! Very personal. I highly recommend.
Sadly, it rained all weekend so we didn't actually get to really use them to tool around Boston. But the training was fun!
http://www.seacoastfunrides.com/