Tonight as I was visiting different blogs I came across what looks and sounds like the perfect bag to carry on outings. I couldn't wait to pass this information on.
Here is the link: http://www.etsy.com/shop/PorteenGear
I haven't ordered one yet, but am thinking seriously about it. It appears to be roomy enough for a camera, lens, and pocketbook without being too bulky. There are several colors and patterns to choose from or you can customize it.
Here is one that caught my eye.