Ben Witherington has a post about "Why Arguments against Women in Ministry Aren't Biblical" on his blog:
http://blog.beliefnet.com/bibleandculture/2009/10/why-arguments-against-women-in-ministry-arent-biblical.html Witherington is somewhat of an expert on this topic, having authored: Women in the Ministry of Jesus: A Study of Jesus' Attitudes to Women and Their Roles as Reflected in His Earthly Life (Cambridge University Press, 1984), Women in the Earliest Churches (Cambridge University Press, 1988), and Women and the Genesis of Christianity (Cambridge University Press, 1990).