Couldn't really get started (with the latest clean install of leiningen from homebrew).

  $ lein cljsbuild auto async-tutl
  ...
  java.lang.Exception: Unknown build identifier: async-tutl

Did the name of the tutorial change?

edit: ell instead of 1. I guess that's why I use a heavily-serifed font for my coding. I even re-read the command several times looking for a simple typo to catch exactly this problem.