ok smart pens have been around a while now.
recording writing, or audio, or both.
helping with math, translation, lots of stuff.
great for meeting, great for class (capture notes and/or audio for playback/storage/study)
But this has to be one of the best ads for a smartpen. Every parent should see it.
http://www.youtube.com/watch?v=bX5z4w4A5HA&feature=related