I met one girl who has had it done, but she still had to take voice therapy after (other wise, the results aren't to there full potential). It's pretty risky, and it only works on making your pitch higher -- and there's a whole lot more than pitch to voice, it's the resonance, tone, the way you speak. Even if you have a lower pitch, you can still sound like a woman and even sound pretty sexy. Just look at how many people drool at Kate Moennig (Shane, from the L-Word). She's a woman and her pitch is pretty low, but she sounds like a woman still.
Also, remember that you'll probably have a lot of times where you think your voice sounds like crap but others don't. I hate my voice half of the time and I hate to hear it, but I don't have any issues from it. I'm ma'amed on the phone, and people don't question my gender in phone or person.
Either way, you have voice therapy options. There's the clinical way, the theatrical way, and also all of those tapes, exercises, etc.
good luck,
--natalie
