Presentation today at Ruby User Group Karlsruhe about Red.
Red lets you develop javascript code with ruby.
The “slides”: http://prezi.com/90854/view
To get started with Red, I put together an archive with all you need to play around: ruby_red.zip
It contains my current fork of red, my red_query framework and example files plus a Rakefile for compilation.

Also checkout github.com/julius.