Sturdy Girl Cycling: Women's club and race team
http://www.sturdygirlcycling.com/

Bicycle Club of Philadelphia
http://phillybikeclub.org/newbcp/

Suburban Cyclists Unlimited
http://www.suburbancyclists.org/

For more info about women's racing:
http://groups.google.com/group/pa-womens-racing

WindingRoad, Becky, or anyone else reading...feel free to PM me with any questions about the area.