Seconded. If you're going to have any success in converting people who write Clojure code away from Emacs, you're going to need to copy its good parts.
"If you're going to have any success in converting people who write Clojure code away from Emacs"
I'd say it would already be great if they could bring newcomers to Clojure: people who are rebutted because of Emacs.
As to me I'd need, at least: ace-jump-mode, paredit, the powerful macro system and the ability to create my own rules for highlighting / overlaying text as easily as from Emacs.
Short of that I'll keep using Emacs. Now what I think: it's probably easier to add LT's "instarepl" to Emacs than to add one million lines of elisp code to LT so...
I fully expect someone to hack a "Clojure instarepl" Emacs mode one of these days.
Speaking of which, are Emacs keybindings coming any time soon?