This week I'm finding it really hard to cognitive-dissonantly validate why I don't know javascript yet. But you're breaking me, O constant-plethora-of-awesome-javascript-submissions.
3 months ago I thought JS was a toy language for those who don't know any real programming language (a.k.a. script kiddies). I've never been so mistaken in my life.
Node.js (written in CoffeeScript) + MongoDB/CouchDB/Redis + socket.io is a wonderful (and scalable and wicked fast) development platform.