While everyone else discusses the uselessness of the map: shouldn't it be, "With whom do you hang?" I mean, if you're gonna use "whom," might as well not end with a preposition.
I followed your tutorial and got briefly hung up by an error saying that Canvas wasn't defined. Turns out I was running it on the newest version of Meteor, and in 0.6 they started putting local variables at the top level in an IIFE. Functions declared using the named function syntax (function name() { ... }) are locally scoped, as far as I know. I fixed it by changing it to Canvas = function() { ... }.
Other than that small problem, cool article, thanks!
Our team made Take-It-Offline flags that we'd wave whenever someone started going off track during standup. The change was immediate, standup time was cut in half. Now people don't even bring their flags, we just raise our hand or quietly say, "TIO!" Once standup's over, those that had items to TIO stick around and talk about them.
I've been taking the Programming Languages course on Coursera, the motivation for the course is exactly what you're talking about. "Syntax doesn't matter" has become something of a catchphrase in the lectures, emphasis is always on semantics and how different languages accomplish the same/similar things.