Great presentation at DrupalCamp Colorado, 2011 covering how to work with some aspects of the Form API, including dynamically showing and hiding elements, and modifying existing forms.
Presentation by Ryan Szrama from commerceguys.com and ubercart.org showing how to set up and run e-commerce site with Ubercart quickly using installation profile.
Just a quick video on setting up a rule that posts a message to a logged in user.Hopefully it will quickly show a new or potential rules user the easy of use and power of rules.
This video demonstrate how to create a drpal site, add a theme, create custom content types and views, add third party RSS content and turn on an e-commerce store in Drupal.
With launch of iPad and NexusOne - iPhone/Android application market can't be ignored. Both these technologies has great potential to use our existing web based tools such as drupal.