[eggy]

Readable stack traces. Unfortunately, the JVM is the culprit here. I like Clojure's syntax, and some other bits, but if I were to chose a Lisp that runs under another system like Clojure, I'd choose Shen [1].

   [1]  http://shenlanguage.org/

[hellofunk]

>The Shen kernel is under BSD and currently runs under CLisp, SBCL, Clojure, Scheme, Ruby, Python, the JVM, Haskell and Javascript.

Hm, I guess I can't imagine how that would work, one language running under all those environments?

[jarcane]

Shen is built on it's own simplified parent dialect that is easily implementable in pretty much any language. Once you implement that core, everything else comes along for free, in theory.