The Livescribe pen is a smart pen that records what you write on paper and the audio that was said during the same time. You can then plug the pen into your computer and get images of your notes and audio files of the sound. You can create pencasts that create videos of the audio and written work together. These pencasts can be shared on the web and embedded into webpages like wikis and blogs.
Educators all over are starting to use these pens to collect and gather samples of student work. They can also be a useful teaching tool. Please see this blog, Live Learning with Livescribe for some excellent samples of student work using the livescribe pen. There are examples from kindergarten right up to high school.
Here are some sample pencasts:
Below are some video demos.