Splash Damage has a number of very reasonable arguments for limiting themselves to one gender since two genders either creates twice as much work or halves the options for both. Some artwork is going to be easy to transfer from one model to another but a second gender would still create a lot of work (particularly for animations). I'm also glad they didn't try to balance everything and end up with something awkward, such as a male Security faction and female Resistance faction, or worse designate one of the sizes female and the other two male.
However while these may be reasonable arguments for exclusion that doesn't mean there aren't reasonable arguments for inclusion as well. As I said at the beginning when character customization is a big feature for your game then excluding an entire gender is going to irk some people - people would also be irked if everyone was one ethnicity for that matter.
Stepping out of the Brink section for a second, since these forums first opened (when they were exclusively for the Elder Scrolls) there have been lots of people asking about multiplayer. Morrowind didn't have multiplayer, Oblivion didn't have multiplayer, Fallout 3 didn't have multiplayer, and it looks like the core games for both series will remain exclusively single player. However that doesn't mean people can't civilly discuss Elder Scrolls multiplayer, and maybe one day there will be a spin off (like Battlespire) which incorperates multiplayer. I certainly hope Splash Damage is able to gather the resources together to later add women although I do understand that would be an enormous undertaking for the character artists and is thus unlikely.
