In Boston there was a python workshop for women which provided much inspiration for this Ruby one: http://bostonpythonworkshop.com/
There was a similar event some years ago also sponsored by the Berkman Center, with some TAs participating in both: http://blogs.law.harvard.edu/genderandtech/2009/10/20/post-w...
And then there is the Ada Initiative, which I think is fantastic: http://adainitiative.org/