One of the best things about WinCustomize is that it is largely driven by the community. You folks have the most power when it comes to promoting and encouraging artists on the site. You're also the most powerful marketing force there is when it comes to spreading the word of WinCustomize and skinning to the 'net at large.
Like it has been said, if the community wants to more actively encourage female skinners, the community has to step up and do something about it. This isn't a problem that can be fixed by "someone else" If this is an issue that is important to you, you're the only one you can rely on to promote the issue.
Write articles (and there is NO article moderation queue. all articles are accepted, but only select ones are featured. They have to be well-written and longer than a few sentences to qualify).
Start more community projects. Gather together all the female skinners in a single group and start working on skins and suites. What's stopping you from forming an all-woman skinning studio? MaxStyles could use some competition!
Are you involved in other female-oriented online communities? Get them involved, try and bring in more people to fuel and promote the cause.
My point is that if it's an important issue to you, you need to start working to improve the situation too.
We will always officially promote users based on their contributions and the quality of their work. Being male, female, disabled, healthy, European, Asian, American etc makes absolutely no difference to us. Items selected for featuring on the front page, in periodic round-ups etc are picked based on their quality. We work based on achievement, not based on minority profile. We also do not work under the idea that people are owed any rank or title. It's not something anyone is entitled to, it is something that is earned. No one wants to be "given" a promotion, they want to earn it. That's how we're going to continue to operate too.