i've got a yamaha zuma, 95 mpg.
has 3000 miles on it (1000 of which are my own) and i drive it all summer long. You would be amazed that it takes me the same, if not less time to get to my destination.
in fact i spent last weekend tearing apart the carb and re-jetting it so that its ready to go for the summer..... runs like a top 
i drive 15-18 miles every day and i plan on starting to drive the Zuma wednesday 
Great little toy, and for very little $ you can up the speed a lot. (i plan on installing a different clutch, new jets, new intake and maybe changing out the gearing- which should put me at about 45 mph top speed)
i really recommend one, (as long as you dont have much pride left). Mine has a stereo system and security system as well. the security is mostly to make people laugh, and the stereo provides great entertainment as well.
"Do Not Seek Praise. Seek Criticism."
"If You Can't Solve A Problem, It's Because You're Playing By The Rules."
"The Perosn Who Doesn't Make Mistakes Is Unlikely To Make Anything."
-Paul Arden