I've spent considerable time becoming an "expert" in other non-web languages. I'm curious about others' experiences with projects like Parenscript ( http://com

I've spent considerable time becoming an "expert" in other non-web languages. I'm curious about others' experiences with projects like Parenscript ( http://common-lisp.net/project/parenscript/ http://common-lisp.net/project/parenscript/ ): "Parenscript is a translator from an extended subset of Common Lisp to JavaScript. Parenscript code can run almost identically on both the browser (as JavaScript) and server (as Common Lisp)." Does anyone have experience with such tools? How about suggestions for similar tools in Python / Ruby?