In addition to the other answers, google is showing you sites with a lot of historically good content, but not necessary the most current.
For example, the Rails Envy guys have split into two good podcasts now: ruby5 at envylabs and the ruby show at envy labs (you'll have to google them, SO won't let me post the links.
The best rails guide resource is now the excellent
http://guides.rubyonrails.org/
Read rubyflow and ruby inside for a week or two, and you'll soon come across all the best ruby and rails blogs.
