Let me say this... there's a reason why ALGOL 68 is no longer used very much. At the time it was criticized for being horrendously complex, and there is some truth to this. Notice that the email points out all the different things you can do with ALGOL 68 compared to Go. If we were to compare all programming languages this way, wouldn't C++ be the best language ever?
The Algol68G interpreter has installers for for Windows, Fedora, Centos, RHEL, Ubuntu and Debian. And the source tarball will compile on Solaris, BSD and OSX etc.
Site also has stashed within the British DRA's (Defence Research Agency's) Algol68R compiler retooled to generate C. [as algol68toc] (DRA's compiler is actually written in Algol68!!)
Sample Algol68 source code can be found at http://rosettacode.org/wiki/Category:ALGOL_68
enjoy - N