Shows how you can use the ajax framework in Drupal 7 to load additional content onto the page dynamically after clicking on a 'read more' link.
The sample code for this series is in the Downloads tab for the first video in this series: http://drupalize.me/videos/introduction-jquery-and-javascript-drupal#dow.... If you're skipping around, and things aren't working, you may benefit from going back to the beginning and completing each of the videos in order.