In a few months I'm going to the Open Source convention out in Portland (I'm pretty excited, it's a good nerd conference), and when registering I had to pick out my tshirt size. Suprise, they now offer women's sizes!!! It's the little things when you're a girl geek- all my previous Oscon tshirts are Men's Medium because they didn't even offer women's sizes the other times I went.
In my closet is an entire collection of unworn geek tshirts I've collected over the years, all in men's sizes. So I tend to see "do they offer women's sized tshirts?" as a bit of a equality-in-engineering metric.