Thats one reason why I dislike those pocket digital cams, though they certainly have their advantages (they fit in your pocket). Thats probably one of the biggest advantages of an SLR, their AF sensors are much more sensitive than a pocket cameras and you can always manual focus through the lens and just snap the shot with the proper exposure, so no waiting for the camera computer to try to take the picture, assuming you know how to do it properly. A cheap disposable camera does in theory work so long as you keep your subjects past their preset focus distance (they usually focus from about 4ft on to infinity, meaning most shots are in focus but also not too sharp and with basically no depth of field) but their exposures are pretty hit or miss. So in my mind your options are get a small (they're getting smaller and smaller) digital SLR, or stick to the small Sony and turn on some lights or try to get closer to your subjects so that your cameras autofocus light (on some models of the Sony I recall its almost a laser-grid pattern) is brighter and your autofocus sensor won't have to work as hard to achieve proper focus, which means you can take the photo faster. If you go the SLR route, the lens you'd want for indoors would generally need to be pretty wide as you'd likely get a non full-frame sensor that magnifies a lenses focal length. I have a 17-40 Canon that I love for anything indoors or out.
