How big was this Newton 2x00? I use the nokia tablets as "electronic paper" with xournal, an opensource app availabe for all linux distros. There is no handwriting recognition, but it allows me to make quick handwritten notes, text marking, and you can annotate pdfs with it. All it requires is a good touchscreen. I have tried xournal on the smartq's but their touchscreen controllers can't handle the handwriting well. The nokias can, though. Basically you might look for any tablet like device that somehow supports xournal.