I mentioned before that I made ParEdit work in the SLIME REPL. Here's what I added to my .emacs file to activate it:
(autoload 'paredit-mode "paredit"
"Minor mode for pseudo-structurally editing Lisp code."
t)
;(add-hook 'lisp-mode-hook (lambda () (paredit-mode +1)))
(mapc (lambda (mode)
(let ((hook (intern (concat (symbol-name mode)
"-mode-hook"))))
(add-hook hook (lambda () (paredit-mode +1)))))
'(emacs-lisp lisp inferior-lisp slime slime-repl))
Taken from http://coding.derkeiler.com/Archive/Lisp/comp.lang.lisp/2007-07/msg01505.html.
