Back in August of last year ravyn linked to an excellent article on women in gaming in her post about contradicting player expectations for fun and profit, inspired by her own real-world experience of being mistaken as male on the Internet. (I must admit I made the same mistake at one point. For what it's worth I think it's an Internet-culture affliction rather than one specific to RPG blogging, though.)
The article mostly covers how to include convincing female PC and NPCs and how to recruit and make women gamers welcome in a gaming group. It also—almost incidentally while accomplishing that—talks about why women gamers aren't more common and why women often give up on gaming. Unfortunately the original link is dead, but I was pleased to find a copy in the Internet Archive: Saving Throw for Half Cooties: Gaming and the Femininely Advantaged.
It's a great article because the thorny politics are almost absent, and it just focuses on good advice for anyone's game. It's far more accessible (i.e., far less inflammatory) than anything I could write on the subject.