Thanks for the great feedback everyone! Here are some answers to some questions others have posted:
1. Has she gamed before? - She's been playing computer RPGs for a long time (her current favorite is Oblivion). I introduced her to D&D 3.5 (her first tabletop RPG) around a year ago during a short one-shot. She couldn't find a local group to play in, so she's been playing in a play-by-post game for a while. So, she loves the genre, is very familiar with the concepts, and has plenty of computer RPG experience but very little tabletop RPG experience.
2. Has she observed the group play? - Yes she has, twice now (once an all-nighter), so she has seen us at play. I've also told her plenty of stories of the current characters (and their players).
3. Will she be the only woman? - Nope, there is one other woman in the group (another player's girlfriend, actually).
4. What is her play style? - I haven't seen enough to know for certain, so I'll have to ask her about this. In her PBP game she seemed really into the role-playing part (more so than my current group) but she was very into making an optimal build to kick butt, too.
5. How old are we? - In our group of seven (counting her) the youngest is about 20, the oldest is about 35, and the average is about 30. She and the other woman are the least experienced, and the rest of us have several years of gaming experience (that is not a knock on gender, simply a fact of our group).
6. Am I making a big deal about this? - Maybe. My biggest fear is what the hell do I do if, after the trial period, my group doesn't want her to stay? I'm mainly trying to do all I can to avoid that (short of not even letting her try).
Thanks again,
Atavar