If you are looking to learn more about Ruby in Rails, these are the tutorials that I think are the best.

- Rolling with Ruby on Rails by Curt Hibbs. Part 1: http://www.onlamp.com/pub/a/onlamp/2005/01/20/rails.html, Part 2: http://www.onlamp.com/pub/a/onlamp/2005/03/03/rails.html

- Rolling with Ruby on Rails Revisited by Bill Walton and Curt Hibbs (sequel to the previously mentioned tutorial). Part 1: http://www.onlamp.com/pub/a/onlamp/2006/12/14/revisiting-ruby-on-rails-revisited.html, Part 2: http://www.onlamp.com/pub/a/onlamp/2007/01/05/revisiting-ruby-on-rails-revisited-2.html

- Getting Your Feet Wet With Ruby on Rails by Paul Adams: http://www.webmonkey.com/05/28/index4a.html

- Fast-track your Web apps with Ruby on Rails by David Mertz of IBM: http://www-128.ibm.com/developerworks/linux/library/l-rubyrails/

- Four Days on Rails: http://rails.homelinux.org/

- Really Getting Started in Rails by Amy Hoy: http://www.slash7.com/articles/2005/01/24/really-getting-started-in-rails

- Using Ruby on Rails for Web Development on Mac OS X by Apple (useful for non-Mac people too): http://developer.apple.com/tools/rubyonrails.html