I ride unicycles, been doing this for about 5 years now, my 10yr old daughter has been riding since she was 6 as well.
Great fun, VERY ADDICTIVE, great for building peoples self-confidence and keeps you really fit and healthy.
We have LOTS of members at our weekly club, many new members arrive each week through word-of-mouth and on weekends we go out for Muni rides (Mountain Unicycling) - try searching YouTube for "muni unicycle" and you'll see plenty of video clips 
-Fedorov
Have you heard of the guy that crossed North America on a unicycle, even carrying his own gears? Approx 100km/day.
Myself I cycle alot. Home and on trips to Europe (hence my avatar on top of Mont-Ventoux France). France, Corsica, Italy, Deutschland, Spain, Switzerland, plus here at home (Québec, Canada)