I will reregister to vote when I legally change my name.
However, I will still be "Sara" and "Female" legally for the 2008 election in November. I will not be intimidated by this; that name and that specification are simply labels the country knows me by. They don't know me as "Daniel, Male" because I haven't told them yet. So I feel no major threat in voting as "Sara." It's just a name.
Fortunately, my ID does look quite boy-ish. I took it after I started cross dressing.

I don't face trans discrimination very much because most people either assume I'm a boy or think I'm a lesbian. I do run into homophobes sometimes.