Hey! Here's a copy protection scheme for you. Put all your images into a .TAR file! Then Windows users won't be able to extract them and copy them.
winzip can extract tar files. There goes that idea...
I don't think there's 100% protection with anything that's readily available right now. The Sony thing is DRM, it doesn't stop copying, it limits it (while inviting viruses.) It also installs software on the computer, something you would never want to do with an image disk.
Photos: http://www.spirer.com
One People: http://www.onepeople.com/
Surfaces and Marks: http://www.withoutgrass.com
