Pocket-Lint: If you're not familiar with the Livescribe smartpen setup, allow us to fill you in. The Echo is the follow-up to the Pulse and, like its predecessor, contains a camera that is capable of shooting over 70 frames per second.
Working in tandem with specially designed paper that has thousands of tiny dots on it, the camera records the dots that you connect and then can recreate those marks, digitally, on your computer using software that decodes the pictures. This clever method allows smartpen to know exactly where the pen tip is on any given page.
