It seems to me that the issue is discussed more often these days. My first contact with it was when talking to the organisers of the "Women in Free Software" workshop during the 4th Free Software Forum in Porto Alegre in June 2004. Then there were several other meetings and articles, which made me curious, so I wrote issue 76 (careful: shortened German version only) of the Brave GNU World about it.
Recently there was the article by Fernanda on Groklaw and now I stumbled upon an article on Netzpolitik.org — apparently the OSI has now also discovered the topic.
From the comments on Groklaw and also to Fernandas Blog "Free Software with a female touch" here on the Fellowship site, it seems this topic can be quite controversial.
If someone has some new theories on why Free Software has so few women, I’d be interested to hear them.