Rebol is a fascinating language, well worth a look if you are a language-geek.<p>Also, it's creator Carl Sassenrath wrote the Amiga Computer operating system kernel, the first preemptive multitasking system on a home computer.<p><a href="http://www.rebol.com/" rel="nofollow">http://www.rebol.com/</a><p><a href="http://en.wikipedia.org/wiki/Carl_Sassenrath" rel="nofollow">http://en.wikipedia.org/wiki/Carl_Sassenrath</a>