There are indeed some hateful remarks in this thread, and definitely quite a bit of less-than-understanding ones. Maybe some of the people posting here could open up (at the very least) a quick wiki before flinging judgements.
Everyone has a bodily and a mental gender. The biological disorder that makes these different from each other is well documented. In that light, I cannot see a reason why we shouldn't address Thor as "she". She's serious about this, and what exactly are we if not our minds?
My friend never really doubted she had the gender identity of a woman. She was quite sure at a very early age and she only saw this confirmed when she grew up. I got to know her (over the internet) without the knowledge that she was transsexual. I got the impression of a genuine woman, but I did ask myself questions after she told me, that's only natural I think. But I got to know her better and she is definitely a woman and a fine one at that. Though I only slightly felt sexually attracted to her. I feel attracted to her as a very nice, humorous and witty, laid back personality, and I hope we will stay friends for life.
Bottom line is: it's not like transsexual people are from outer space. You'll find quirks and likes and dislikes, interests and wishes for life, that makes all of us human.
Thor: if you want, you can pm me or send me an email through the address you can find on my website - I won't post it here, for obvious reasons. Just in case you want to talk, and though I can't promise you anything, I could ask my friend if she's willing to share some of her experiences with you.