David Rothstein talks about some of the Drupal 7 User Experience (D7UX) work that got into Drupal 7. He co-presented at DrupalCon San Francisco about how to integrate the core Drupal 7 usability improvements with your contributed module. He talks about some of the specific usability improvements in Drupal 7 such as contextual links, administration shortcuts, and the new information architecture of the administration screens.

Rothstein also emphasizes the importance of contributed modules developers complying with the new usability standards so that there is a consistent user experience for administrators and content creators in Drupal 7. For more information on usability tips for contrib module developers, then be sure to check out their DrupalCon SF presentation.