Resources for the print article.
The Ruby home page is at www.ruby-lang.org. This page has many links to other sites, including tutorials and documentation, for the Ruby language.
If you are interested in a printed reference, the book Programming Ruby: The Pragmatic Programmers' Guide, written by Dave Thomas and published by the Pragmatic Programmers, is an excellent starting point.
The WEBrick home page is at www.webrick.org. A nice tutorial on WEBrick, including how to write servlets, is available at rubyurl.com/N3dPn.