The old Ruby Facets website was a static 100% XML/XSLT site. When I originally created the site, I though XML/XSLT suredly was the pinnicale and proper way to build a modern site --for no other reason that XSL is a pain in the ass! Well, we all know the ultimate outcome of this story. XML/XSLT is turning out to be an exmplar of over engineering by academics.
The new Facets website runs of Jekyll, a static site generator supoprted by GitHub. (another good site tool is Shunman)