Enable WordPress Post Formats Plugin
This plugin is very simple. It enables all eight WordPress post formats. This is handy for modifying themes developed prior to post formats addition to WordPress in version 3.1.
Using Post Formats
If you are a theme author, or feel comfortable in a theme’s functions file, check out my post about Enabling Killer WordPress Post Formats in Thesis, which contains the exact code used in this plugin. Post formats have powerful possibilities combined with a few conditionals and creativity.
To add styles that only apply to a specific post format, simply add the format class before the element you are styling in your theme’s css file. The audio format will have a class – .format-audio, images format class will be .format-image, and so on.
To learn more about how to use Post formats, check out the WordPress Codex – http://codex.wordpress.org/Post_Formats
If you have a problem, question, or suggestion, please let me know.