Author of the CoffeeScript book here. This is really, really cool! I especially like that there's annotated source (http://code.alecperkins.net/coffeetable/docs/coffeetable.htm...).

A couple of things:

1. I can't seem to add linebreaks in multiline mode; both `Return` and `Shift+Return` submits the command. Looking at the source, I think the problem is that `settings.multi_line` isn't modified when you click the checkbox; only `settings.showing_multi_line` is.

2. It'd be great to have detailed object output instead of just "[object Object]". A simple way to do this would be to run everything through JSON.stringify; or you could go prettier with nested indentation levels and such (there are several existing libs for this).