I did years ago, and a few of them still seem to be around. But won't be doing it again both due to reasons we have discussed before, and because the implementations seem to have totally dived off the deep end of complexity by now, and don't really look like they'd be much fun anymore.

Well for fun you might do want no one else has done, and contribute a Lisp program for meteor-contest - solve as you please, there's no cat herding for that one

http://shootout.alioth.debian.org/u64q/performance.php?test=...

Yes there are several that include a credit to you in the source code comments.

The last program Alexey Voznyuk contributed seemed mostly to be inline assembler with a hint of Lisp - off the deep end :-)