My short answer, as a male dominant...

I don't see any reason why a woman can't be a dominant, and a man a submissive. Each relationship is different, and the submission in a BDSM relationship is the result of individuals making choices for themselves, not - hopefully - the action of social repression and sexual discrimination.

As a man, I'm not sure I could say I'm a "feminist," per se, especially because of the transformation of the word "feminism" from a term refering to the emancipation of women from a real, unjust, and ingrained servitude into a term for a kind of fringy stereotype. I will say, though, that I respect the hell out of the feminist movement, and I am dismayed at what a cursory job most American History classes do of covering the remarkable efforts of women, especially in the 19th century. Feminism was not just about winning the vote, or the equality of women, but women were leading Abolitionists, and played a vital role in leading the labor fight against the robber-barons of the age.

While I hardly think women have truly won equality in the modern world, the progress made is partially responsible for making the modern, ironically egalitarian culture in the BDSM world possible.