I don't think you have to be a whining luddite to want one of these. Look at how much smaller it is than a tablet pc. You could dash off emails all the time, and quickly annoy everyone you know.

What's the output/feedback mechanism? If it just records my pen motion, that's not much better than writing on paper, then later scanning the paper into my desktop. I'd hate to send an email where I couldn't double-check what address I was sending it to.