Yep, I'm one. I've been running games for about 2-3 years now after a many year hiatus, but ran my first back in 1977 or so. We alternate in my group, and I'm preparing to run an Eberron campaign, probably starting in February. I've run D&D, d20M, Call of Cthulhu (old and d20 rules), Traveller (in days of old), MERPS, GURPS (Hellboy & Arabian Nights)... probably others I'm forgetting. I also have one PDF publication to my name and another coming out soon from Dog Soul.
The other female in our group has run one game also, and will probably do so again.