French-speaking Ruby on Rails Website
For the french-speaking guys whose English is, well, not so good, we're building a french-speaking RoR website : http://www.railsfrance.org/
It will contain, among other things, translations of documentation and landmark articles (some articles by Curt Hibbs already translated).
Pour les francophones, pour qui l'Anglais ne serait pas la tasse de thé, nous sommes en train de développer le site francophone : http://www.railsfrance.org/
Il contiendra, entre autres, des traductions de doc et d'articles phares (certains articles de Curt Hibbs sont déjà traduits).
Pour découvrir Ruby on Rails ou participer à son développement dans le monde francophone n'hésitez pas à nous rejoindre.
del.icio.us as Ruby and RoR resource
Another good resource for up-to-date information on Ruby and RoR information is http://del.icio.us.
Once you get there, you can perform a search on "Ruby" or "Ruby on Rails". You can also generate a RSS feed based on these keyword tags, and if you like, you can keep up-to-date in your RSS newsreader.
More Ruby on Rails resources
There's been a flood of new Ruby and Ruby on Rails books since this thread was last updated. For learning Ruby, I highly recommend Peter Cooper's Beginning Ruby. For an introduction to Rails, SitePoint's own Build Your Own Ruby on Rails Applications is a good starter.
The most exciting new Rails book is Obie Fernandez's The Rails Way. It assumes you already know your way around Rails, so it isn't good for beginners, but if you want to dig deeper it's a fantastic book. It's also the only book that currently is updated for Rails 2.0.
There's several sources of great screencasts about Rails. The ones at www.peepcode.com, by Geoffrey Grosenbach, cost $9 each but are very well done and about an hour long. And there dozens of free, short-and-to-the-point ones at Ryan Bates' www.Railscasts.com.
There's now a bunch of versions of the API documentation available online with various interfaces. My favorites are www.RubyBrain.com (for Ruby) and www.RailsBrain.com (for Ruby on Rails). The software is open-source and you can download the whole thing to view locally, or just view it online.
There's an amazing number of Ruby on Rails blogs now. A few I'd recommend are www.RubyInside.com, which focuses on the language itself; www.TheRailsWay.com, written by two Rails core team members; www.errtheblog.com, by Chris Wanstrath and PJ Hyett; and Josh Susser's http://blog.hasmanythrough.com.
Beware of the Rails wiki (wiki.rubyonrails.com). At one point it was the central source for information about Rails, and although there is a lot of great information there, there is also a ton of badly outdated information that can easily lead you astray.
Finally, if I may be forgiven a little self-promotion, since it is responsive to the topic, I coproduce a podcast, www.LearningRails.com, that teaches the fundamental concepts behind Ruby on Rails, and the Rails resource site www.BuildingWebApps.com, which has both original articles and a large set of annotated, organized links.