Since everyone is talking bicycle here.... I'd like to throw in a little self serving advertisement.. I dont pedal, but I do support those who do in a variety of bicycle fundraisers - namely the BikeMS and the Tour De Cure (National MS Society and American Diabetes association rides, respectively).
I've ridden a motorcycle alongside 12,000+ cyclists in the Houston to Austin MS ride now for 5 years, and have become the Safety Chair for the Houston Tour de Cure...
Any of you pedallers out there, if there's a ride in your region that supports a cause that interests you (whatever that may be) its an excellent motivator for prepping and getting in shape for the longer rides.
Itravel.. what neck of the woods do you hang your hat in? The guy who recruited me into supporting and managing the ADA ride participates in about 5-8 different Tour De Cure's around the country annually, mainly as a networking thing (he's a diabetic rider).. and I may be able to give you a point out for a reputable bike shop or a specific individual if you are living near one of those markets.