Oh, and to actually post something on-topic... I'm a male and completely het. But in Dragon Age: Origins I played a fem char so I could romance Alistair. And it was fun. I totally would have played a male and still fallen for Alistair as he was the most wonderful char in that game. (If it's in a game it doesn't count, right?)
In any event, I want to see the inclusion of the options in Me2 as DLC because more options are always wonderful. It's be even more sweet if they made them completely new and fully rounded out characters who people of all orientations could be interested in and be engaged in their storylines.
So, in response to the OP... I hope Samara ISN'T a romance option for Femsheps... or malesheps for that matter. Unless there are some major revelations in the game I don't know about, it would be a complete compromise of her character as we know it for her be interested in romance.
That being said, she is hot.
So, up with creating interesting characters of all sexualities... down with hot chicks with big... eyes who like hot chicks with... big eyes that are there to solely sell the game for teen boys.