A bunch of good articles on various Rails-related topics lately:

• Bar graphs with gruff: Make Keynote-like pretty graphs with RMagick without breaking a sweat.
• The Joy of Migrations: Step by step on how to turn your database schema into an agile gel.
• Supporting Themes In Your Rails Application: Make your application come in different shapes and colors
• Rails Routes – :controller/:action/:id VS. :controller/:id/:action: An alternate approach to the default Rails routes