All right, so it's just the first time, but after a couple months of having the toilet seat set up and sitting on it (and NOT doing a thing), tonight she DID! We were playing just before bedtime with DH and she was running around sans diaper and starting to be more fidgety. I said, "Do you want to sit on the potty?" and at first she was very adamant that she did NOT want to, but then I told her that I was going to read books and I was going to do it in the bathroom. So she came in and sat down, and within a couple seconds DH said, "Uh, she's going." I couldn't believe my ears (what he said - I could hear HER until I stopped talking!). Sure enough! At first she tried to stand up and looked worried, but we applauded and cheered and gave her a cookie and made a big production about wiping and dumping it in the toilet. Then we called my parents and ended up talking to my sister.
So I know this is going to take a lot longer than just now, but FINALLY, we've christened the potty chair.
I just find it especially interesting that while at Target today I was eyeing the little girl underwear and looking at sizes and deciding it's fine if she doesn't potty train for a while since the smallest size I could find was for a 28-lber, and I don't think she weighs nearly that much.
Ok, rambling now... I'm just so happy for her!