Just in case you can't get into the two hour Segway tour, here is some info about the one hour Simply Segway Experience which my DH and I did last month. It is offered at 12:30 and 1:45 pm. Most of the time you spend learning how to ride inside but you do get to go outside between Innoventions West and the rose garden. They block off a brick sidewalk and you get to ride for 15-20 minutes outside. The cost is $30 per person but with our Disney Visa we got 20% off. It was lots of fun and by doing the afternoon tour, we got to ride our favorite attractions at Epcot in the morning when it was less crowded. Now that I know the segways are so much fun and not a bomb like our Keys to the Kingdom tour, we'll gladly skip the rides and pay the extra amount for the two hour Segway tour on our next trip.
Good luck! I hope you can get a spot!
Donna