Man, I've still got Working Out Loud on my reading list from a post you made months ago. Now this one looks incredible. I can't believe he wrote the words:

"It will consist of encrypted sequences of multihundred-digit prime numbers. Unique, anonymous, and verifiable, this money will accommodate the largest transactions. It will also be divisible into the tiniest fraction of value."

in 1997! Whoa! It's not often that I want to read a 20 year old book about technology, but this one is on the list.

edit: in fact, I just ordered them both!