I use Emacs for Clojure development (and pretty much everything else) and still think there should be a project like Nightcode. I frown everytime someone recommends Emacs to a newbie interested in Clojure (and hasn't used Emacs before). There is a lot of yak shaving to get the whole thing work (and comfortable) to scare away anyone.
Very true. I use Emacs myself, and I am happy to show it off and rave about its merits to felliw developers. But I don't recommend it to newbies. Newbies have enough on their plate with learning a new language. They don't need any distraction from that.