Stuff like the LiveScribe is close, but not quite, what I want. I think at the moment one of the most likely candidates is actually something with AR. Plus, it

Stuff like the LiveScribe is close, but not quite, what I want. I think at the moment one of the most likely candidates is actually something with AR. Plus, it would just be really stupendously cool to have a blank notebook that is "full" of AR writing. Talk about invisible ink.