The two bibles of the Ruby on Rails world are
Agile Web Development with Rails—Second Edition http://www.pragmaticprogrammer.com/titles/rails2/index.html (Technically the second edition is not out yet. But you can buy the PDF beta)
Programming Ruby (aka The Pickaxe book)
And here are the most important links. Some tutorials may contain outdated code and techniques though.
Rails: http://www.rubycorner.com/ http://www.planetrubyonrails.org/
http://www.econsultant.com/web-developer/ruby-rails-tutorials/
Ruby: http://poignantguide.net/ruby/ http://www.rubyinside.com/ http://programmingishard.com/tag/ruby http://www.dzone.com/links/tag/ruby.html