I bought this very special pen recently and I have been kind of using it. I have yet to take it out of the house with me and it has thus far stayed a private toy. It is pretty cool — it records audio and associates the audio file to what you scribble or write on the specialty notebook. I not only hope that it will help me with note taking, I think it will be useful in my usability and UI design tasks.
Here’s a funny ad for the Livescribe SmartPen: