I'd say that a "diaper bag camera" is all about being lightweight and cheap, not being full of features. You want features, get a D-SLR. I'd look for one of the smallish pocket cameras with image stabilization. I think Canon's new SD800IS (a.k.a. Ixus 850IS) is the current benchmark for the category. A nice bonus is that you get a 28mm-equivalent wide angle. Panasonic, Leica, and Ricoh have camera with similar specs, including the wide angle bit.

The other intriguing compact camera is the Fuji F20 or F30. That's the current high-ISO king, which is great if you want to shoot indoors without a flash.