I know this is unsolicited info, but thought I'd post for anyone looking for a cute purse that can also hold baby necessities!
After realizing that my Petunia Picklebottom really *does* look like a diaper bag (that is, one is easily identified as a mom with it), I never use it. (I know, I know, I should take pride in my mommydom, but...)
However, I have found this purse that works well for my needs:
http://www.zappos.com/n/p/p/7158439.html or http://www.bagshop.com/store/mcart.php?ID=2500
If the links don't work, it's by Un Apres Midi de Chien and the model is the Fourmi W. I have the black, but also like the more "fun colors."
There are three pockets. It's got tons of easily accessible room inside, yet doesn't look huge. It's a real purse and looks "grown up" without being leather. The lining is wipeable too. I also like that the brand label is hardly readable. For me it holds:
Back pocket = travel changing pad, 3-4 dispo diapers, wipes, suncreen...
Middle = *everything* (wallet, palm, cell, cheerios, pen, etc.)
Front = big enough to hold my 12" laptop if I needed too, a book, or 8x11 sheets of paper
Downsides: can only be worn over shoulder or in hand.
Not sure where to get them IRL. I can post pics if anyone's interested.