Amina Wadud, though one of many contemporary Muslim feminists, is certainly the most contraversial. This is mainly due to her activism over the years, which culminated in her leading prayers at a jumaa prayer service in Washington, DC in 2005. It was covered by the press all over the Muslim world and even elicited some death threats against her (you can look up a YouTube interview in which she speaks about this).
This is a section of a longer article that in the end was published without this section.
A cautionary word: Muslim women all over the world are pushing for a rethinking of many traditional gender norms that still impeed them from fulfilling their calling as God's trustees on an equal footing with their brothers, fathers and sons. And no, you don't have to go as far as Amina Wadud to make a good Islamic case for that. My point in this essay as an outsider, and in line with my arguments in Earth, Empire and Sacred Text, is simply that she has worked out a theology that is more consistent and compelling than many others. And also, I don't think people of faith can ignore the postmodern intellectual context of today. I believe it can work for us and enrich our understanding of how God wants us to live out our faith in today's world.