There was an interesting post on slashdot today:
You can now see the finest details of some of the finest Italian masterpieces with just one click of your mouse. High-resolution images of classic paintings by Leonardo da Vinci, Caravaggio, and Botticelli are now online with that opportunity. You can zoom in to the smallest details, even ones you wouldn’t see when viewing the paintings in person at a museum. The images have a resolution of up to 28 billion pixels, which is about 3,000 times more than a photo from an average digital camera.
Read the full article here.