Bah, there are plenty of babies that skip the crawling stage and are absolutely, perfectly fine. In fact, I seem to recall hearing or reading somewhere that the number of kids doing this is increasing- I *think* they said this has to do with the fact we now sleep them on their backs right from the start (sorry, can't quite recall the why, but I am sure that more and more kids are skipping crawling).

I believe the "concern" about not crawling is learning the 'cross-coordination' skill- ie- moving one leg while moving the opposite arm, which is a good brain development. But there are other ways to learn this skill and not crawling does not mean your child is not developing properly.

I think your LO sounds like she's doing great. She may well end up crawling- my DS was much the same and ended up crawling like a fiend. But even if she doesn't, it all sounds perfectly fine. Try not to worry (hard as it is!).