My little girl just turned 2 last week, and we've been trying the potty training thing for about 4 months now. As far as putting her in big girl panties? It doesn't matter. She wets them and just keeps right on going... the wetness doesn't bother her at all. She's pretty predictable about pooping, though, and will "hide" when she does it, so I can usually catch her and put her on the potty to do it. She's just about trained as far as poop because most of the time she'll tell me that she needs to go, but with pee-pee, she tells me just after she's gone. I wish I had some epiphany to offer, but I just don't. Let me know if you find something that works...
Oh, and I've read that until kids can go about 3 to 4 hours and stay dry, then their bladders are not developed enough. I try to put Emily on the potty about every half hour or so and she goes every time, and most times wets in between when I take her. She's 2, but I just don't think she's ready yet.