I am late to the party with this but Ada Lovelace Day was celebrated on 24 March 2010 to commemorate the achievements of women in the tech sector. The website asks people to pledge to blog on this day about women in science or technology whom they admire.
Ada was apparently the world's first computer programmer, way back in 1844, and a computer language is also named after her. It amused me to learn that she was Lord Byron's daughter. For entirely personal reasons, I love the combination of poet and techie....
(Image Source : Wikipedia)
For more information on women techies check out The Grace Hopper Celebration of Women in Computing Website.