Absolutely, catch her while she's interested! My son is basically potty trained and has been since his 2nd birthday, but my nephews were interested for a month or two around their 2nd birthday but are not yet completely trained (now ages 2-1/2 and 4). Their parents believed all the hype that kids are just not ready until they're closer to 3, so they really weren't prepared to focus on potty habits, and we strongly believe they missed their windows of opportunity! Stuart, however, saw the potty out at my folks' house before he was 2 and decided he liked it better than diapers. There's been no turning back! I can't help you on the regression thing, but if I were you, I'd cross that bridge if and when I come to it. Don't miss your chance to help your daughter now!