Awesome! I'm trying to visualize how some of the features from the Javascript video in OPs post (http://www.youtube.com/watch?v=gtXpOD6jFls) would work. Are you using it as a straight editor or are you able to take advantage of the killer LightTable features in conjunction with Coffeescript (perhaps the new source-maps stuff takes care of it)?
Yeah, I haven't seen the realtime eval work in Coffeescript - I have to save the file and refresh the browser. That said--the awareness of the workspace environment really blew me away and pays off in tab completion.