Many links for you, my friends:

Gemjack - All the Ruby Gem documentation in one place
Ring Structure and Vortices
Idiomatic Ruby
Tracking ants
Back Dimples rock.
MethodFinder - Something good for your ~/.irbrc
WoW - Rob Pardo interview
Getting Real inteview
Detailed User Tracking
Actionview partials
Cool things with Ruby
Using Aggregate Functions and Operators in PostgreSQL
Forms in HTML
SELECT element and other elements that let you choose things in HTML.
Floating an image to the right in HTML with CSS
PostgreSQL cheat sheet
How to Validate in Ruby on Rails from the RoR wiki
Validation - Securing Form Input in Ruby on Rails