Now that digital cameras and music players have become so incredibly widespread, a forest of sound and imagery is blossoming in our homes. We've got digital pictures in the camera, scans on the computer, JPEGS attached to e-mails, and tunes on tiny players. But there's also the old-fashioned stuff: photos in shoeboxes, videos in the attic, documents in desk drawers, songs on tape and vinyl. How do you transform all of these different elements into...