Awesome!!
, to Japinder and mmmrqs. Wow, guess I should take the plunge and buy one then.
If anyone else is curious, here's a video of this app in action:
http://www.youtube.com/watch?v=RpkrcEHmcPA
I've been using it on my phone -- just with my finger -- and it's better than any keyboard I've tried.
But it's hard to believe, after all these years, I might actually get an eink reader big enough to read technical pdfs and with actually working annotation possibilities....