I've been wanting to learn a new language for a while. Ruby is fun and all, but sometimes it's good to get a different perspective. There are definitely some interesting ones that have shown up on my radar: Lua, Haskell, Erlang, and Scala, to name a few. I've always been intrigued by Lisp, though. I don't think anyone would deny that John McCarthy (R.I.P.) was a genius for pioneering a language th