What are the action items we are working on? Links to all usability-related issues and an overview of the most urgent action items: http://drupal.org/community-initiatives/drupal-core/usability.
Where is the general usability discussion taking place? Mostly in the group posts below and over Mark Boulton group, also in the #drupal-usability IRC channel. Keep up to date by following the #drupalusability and #drupal7ux Twitter tags. There is also a aggregated Yahoo Pipe to collect all things Drupal usability: as webpage and as RSS