CLPython - an implementation of Python in Common Lisp - I think I've already mentioned this, but good things are worth repeating. And they seem to have been busy - they're already very close to a Python 2.5 implementation. I really should play with this a bit, as it combines two of my favorite languages and could help solve one of the central CL problems: the rather meager selection of good (meaning currently maintained and combinable) libraries. But whether I can get it running on Allegro CL 3.01 on my EeePC is rather questionable. I fear that in the last 5 major releases, quite a bit has happened ...