Blazing Cloud: Professional RoR courses and host to SF Ruby meetups.
Cloud Outloud: Engine Yard podcast covering Ruby and Rails, also check out their screencasts, blog and webinars.
RailsBridge: Community site and free open-source workshops for beginning programmers.
Railscasts: Screencasts by Ryan Bates, available free online and on iTunes (podcast and TV).
Rails Tutorial: PDF and screencasts by Michael Hartl, available free online and published by Addison-Wesley.
Ruby Inside: Blog covering Ruby and Rails.
The Changelog: Podcast covering open-source software.