how much is it and what would you do with it?

been rather tempted by that ScribePen thingy.

LiveScribe

sure the sound isn't anywhere near as good as what you're looking at, though, but it can be linked to your paper notes.

LiveScribe also had OCR for scanning out of books, etc.

it looks great. heard about it on edtechtalk. more of a university 'lecture' type tool than school though. might be good for meetings maybe