It's about time something like this became available. It's a camera that captures the entire light field, unlike conventional cameras that only let you get a single plane of light. That means that after taking a picture with this new camera, you can still focus and re-focus on different areas of the picture and get an entirely new photo. It's called the Lytro.
It comes in different colors.
I want one. For $399 - $499 (depending on the memory), I think it's really affordable for a light-field camera.
Visit their website here and play around with the focus and re-focus here.