Here are some interesting bike related sites to check out:

http://www.execpc.com/~jwamser/WORBA

This is the WORBA-Wisconsin Off-Road Bicycling Association site.  Their mission is to promote and preserve environmentally responsible off road bicycle opportunities.

http://www.couplesonwheels.com/
COWs is a fun loving group of tandemists who ride together several times each year.  (You don't have to have a tandem) but you will take alot of abuse it you don't!

http://www.danenet.wicip.org/bcp/

Madison & Dane County Bicycling Community Page.  They have info on events, news, weather, bike shops, racing, touring,
commuting, off road, advocacy, bike groups and more.

http://www.springcityspinners.org
The Spring City Spinners Bicycle Club is a group of recreational touring cyclists who love to ride.  Throughout the summer months the Club holds group rides on the roads of Waukesha and surrounding counties.