I've signed up. Craving a more formal intro to crypto-currencies. Consists mostly of video lectures and supplemental multiple choice style quizzes. Original course included five programming assignments asking students to build simplified versions of a Bitcoin like system, but its not clear there is any programming involved in the Coursera version.<p>A draft version of the Bitcoin textbook the instructors are currently working on is available:<p><a href="https://piazza.com/princeton/spring2015/btctech/resources" rel="nofollow">https://piazza.com/princeton/spring2015/btctech/resources</a>