Comment A ton of Rails 3 Beta links (Score 4, Informative) 197
Over at Ruby Inside we did (and are maintaining) a roundup of ~36 Rails 3.0 beta links/articles (it's up to about 40 now, I think). If you've got Rails 3.0 installed and want to know how to use X or Y or want to learn some of the back story/motivation, the links should come in useful. They're only things that are actually worth reading. Well, mostly..