An Open Cookbook for Ruby?

zby queries: "I've been using the 'Perl Cookbook' extensively for 2 years already and have found the book to be really helpful. Recently I've been learning about Ruby and I really miss that kind of resource. That gave me the idea to build that kind of knowlege base as an free project. I believe it just fits ideally, and could be run on a Slash or Scoop based system without any modifications from the beginning." It sounds like a grand idea, however are there any other such resources on the web?