Since you started with a Sony recently: I just picked up a DSC-U30 - 2megapixel, decent autofocus, and absolutely freaking tiny. Like, so small it makes my cellphone look big. (Roughly - 1.2" tall, 1" deep, 3" long.) And it stabilizes the picture as best it can even though it's super-small. It also comes with some rechargable AAA's and a charger.