> I suspect if I attended more "mainstream" tech events (Java developer
> conferences or MSDN stuff, for example) that those would have more women
> in attendance (closer to on-par with the percent graduating with CS
> degrees or working in the field, that is, about 1/4 of attendees being
> women) and fewer issues.
If you feel offended by hired attractive booth babes being present, you will not like about 100% of commercial technology fairs (I have been at Cebit, embedded world, EAGE). Some advertisement material may use pictures of pretty young women presenting stuff. They will be usually dressed business-style, some companies try to get more attention by dressing them more "attractive" (I think that's mostly the companies where the target group is young men, e.g. gaming related stuff, search e.g. for "Cebit booth babes" to get some of the more "extreme" examples).
I have noticed *much* less to zero in this direction at FLOSS events (FOSDEM, LinuxTag, KDE Akademy, Chemnitzer LinuxTag, Dresdner LinuxInfoTage). Also, I have the impression that the women in the KDE community attending our events are usually very happy and don't have any of these problems (maybe it's different if all attenders are from one community and everybody knows everybody else).