drupal con at paris videos
in case u missed the link its at Internet Archive Search: drupalcon paris
the open atrium talk is at OpenAtriumBuildingaproductwithDrupalandthePowerofDecentralizedFeatures -
i note they are using aegir.
What is Aegir?
Aegir is a distributed instance management system, that allows authorized users to administer multiple Drupal sites across one or more servers, through a Drupal based administration front end.