If you are new to the Gendered Conference Campaign please take a look at this post that describes why we bring gendered conferences to your attention. Especially important is the part about us focusing on the harmful effects of gendered conferences, rather than the intentions of the conference organizers.
Also, here is a link to FAQ‘s about the Gendered Conference Campaign. It would be great if you took a look at them so that we don’t have to cover old ground in the comments.
Update: As Matt Brown points out below, this conference generated the following post here in December: https://feministphilosophers.wordpress.com/2011/12/02/gcc-related-query-women-on-feyerabend/