I didn't realise that they had listed women explicity as a perk. I just thought it was a bad bit of copy. I didn't see their original site and as it has now been taken down.
I thought they had listed it in a less obvious way noting the servers would be women to bait males to attend.
Perhaps this is a bit more than a kerfuffle then.
While what they wrote turned out to be sexist I don't think at all this was there intention. They fell into the trap of sterotyping their audience. If your a hacker your probably a pale introvert with little access to women. The trouble is a hacker/programmer/whatever is just a job title. The people who do these jobs have variety personalities and genitals.
If anything they misunderstood their audience which is a shame really and managed to generate some copy that could offend just about everyone.