Starting Common Lisp

sup /prog/

I've been interested in the World of Lisp lately.
Searching around I found a couple of common lisp implementations (CLISP, GNU LISP and SBCL).
What tools and implementations does /prog/ use?

Emacs has a special lisp mode, what's /prog/'s opinion on it?

please enlighten a poor soul

>>4
Clojure offers nothing new to the table
Lies. At the very least, Clojure offers painless parallelism without locks. Parallel code in CL looks like imperative diarrhea full of locks, indistinguishable from Java. It's embarrassing.