What are your favourite Ruby on Rails learning resources?

I'd like to get a curated list up for beginners & advanced Rails developers alike. what are your go-to blogs, books, etc, for learning Rails at every level?

of course there's the official & excellent Rails Guides (including the comprehensive Getting Started with Rails guide), plus the Rails API Documentation for exploring the tools that are at your fingertips.

in terms of video lessons, RailsCasts (free, or $9/mo for access to revised episodes) is in limbo, but I've found that it's not too out of date to be useful for exploring concepts. meanwhile, GoRails (free, or $9/mo for access to "pro" episodes) is going strong with quality lessons.

as far as courses go, you've got Codecademy (free), CodeSchool (complete Rails for Zombies for free, or $29/mo for access to all courses, other Rails courses included), and Team Treehouse ($25–49/mo, free 14-day trial).

what other resources do you recommend? any video series', courses, bloggers, or twitter users we should all be following?