Just came across this in an interview with Amber Neben of Team T-Mobile:

What do you believe are some major reasons more women don’t get into the sport? Do you have any ideas on how to attract more women to the sport?

Amber: "I don’t think they know it is out there, or I think they may be intimidated by the riders, the bikes, the speed, or maybe they’ve tried it once and can’t stand the prospects of a ‘sore butt.’ There are so many women who exercise and are competitive. I think we need to find a way to get them to try out cycling in a relaxed, learning environment. I also think that targeting collegiate cross country runners would be a good place to start. Those are the type of people who would enjoy physical exertion and who may be looking for a new outlet for their competitiveness"

http://www.dailypeloton.com/displayarticle.asp?pk=5975