"Strings and other types" is up. I can't wait for 3 to 6.
I've enjoyed these first two - they're a good summary of how things are laid out, without getting into too many of the messy details. I miss an explanation of closures, but that'd require lots of messy details, I'm sure.
Not at all. It's a block: the first value points at the code, the rest of the values are the free variables.