I’m intrigued by CamNote, which purports to be a special notebook with markings that allow smartphone cameras to digitize your notes. I haven’t tried it, but I will be getting some samples to try. I’ve tried to use those Logitech I/O pens, and I’ve tried the LiveScribe, but the need to have a battery-powered fat pen + special paper + desktop app proved irritating. Perhaps this combination will be better!