il Thu, 8 Jul 2004 17:51:36 +0900, zuzu <sean.zuzu / gmail.com> ha
scritto::

>ruby, starting the interactive ruby shell, but with filesystem access
>to unix/bsd through the mach microkernel.  in other words, a "ruby
>machine" (instead of a "smalltalk machine" or "lisp machine").

I'll use L4::Pistachio wich should have become stable as of now. 
I believe the guys from the Io language had the interpreter running
directly on L4, wich is a wonderful microkernel (give my little
understanding of OS theory, anyway)