There is some value in having good examples of successful women in entrepreneurship in convincing more women that they should consider it, but I think "this person in my graduate department launched a startup" is probably more significant (regardless of gender) than "a famous woman startup founder and CEO exits, although I've never met her".
women 2.0 actually does a pretty good job with other programs to try to bring qualified women into the startup world (partnership with Founder Institute, various meetups, etc.). I think the most valuable thing would be attracting more women into college entrepreneurship clubs, entrepreneurial classes in undergraduate and MBA programs, and in non-startups, encouraging them to take responsibility to project/product management on products which may become spinouts or startups.