I don't think I've ever signed up for something more quickly than when I saw this announcement pop up on Twitter. Really enjoyed the Functional Programming with Scala course when it ran last year, and I'm happy to see the sequel come to fruition.
As it is now, I feel I'm simply a compiler which translates my imperative Python background into Scala syntax.
At times (for me), the time-based nature of coursera is a very good thing. If I know that I need to complete a homework by 1am Sunday night, which means I need to finish watching this week's videos by Thursday night, that means there's a chance I'll actually do so. Without that deadline (and with no money or grade on the line) HN or Reddit or other timewasters are far too tempting.
https://www.coursera.org/course/progfun
You see archives of the two previous iterations of the course. Their material is always available, and you can stream or download the videos from there.