assert_efficient_sql - O'Reilly Ruby
rails plugin that can detect inefficient queries in test cases
Rails + PHP sharing the same session
Emphasized Insanity: MySQL replication and Rails
toledo’s code blog » Blog Archive » Beware of Rails Optimistic Locking and MySQL
Get Ruby 1.9, Rails, MySQL and UTF-8 to Work Together
Monkey patch the mysql gem to return UTF-8 encoded strings
http://dbisyourfriend.heroku.com/