Bioware have opened up Facebook voting for the design of the "generic" female Commander Shepard that they will use in marketing efforts from now up until release. In the past there has been an outcry from fans who prefer the voice acting of the female Shepard to that of her male counterpart, but Bioware have chosen to use the male version in most of the promotional material.
Anyway, that may change as Bioware are looking for fans to pick a look for "Fem Shep" out of the six looks you can gaze at below. If you have your choice clear - head over to the Mass Effect facebook page to cast your vote.