Your comments

+1 for the idea of super+shift+w, at least on OS X where it's a common shortcut (e.g., Safari).
Sweet. Super fast response--you're a rock star. Adding the command to key bindings worked like a charm. Does it still use args consistent w/ ST1? (e.g. )
If you must, run it through a pre-parser to strip comments before passing it to a JSON interpreter.
Keep the comments. (Docs in one place: the comments! The online project docs get outdated too quickly right now). Just call it a Javascript object instead of JSON.