Check out the Women in Planetary Science blog!
(Note: You don't have to be a woman to be interested in these resources :).
I am a past President for the St. Louis Chapter of the Association for Women in Science. It is a great group and we had a good time with our various events.
Between 2006 and 2011 we co-host Women in Science Day with the Young Scientist Program. I was the main coordinator for this event on the Danforth Campus of Washington University in St. Louis. We bring over 100 St. Louis City high school girls to Wash U's campus for a day of hands on science activities. We also have a lunchtime "getting ahead" panel featuring successful women in science from various careers and stages of their lives who can share insights.
Pictures from past years:
"Getting Ahead" Panel 2008
Minerals and Crystal Growth
Fun with Liquid Nitrogen