You have found the Atrium for SensorHub.org. Registration is open but moderated (damn spammers). This Atrium has the following Groups:
This group contains the Sensor Hub Module Blog (for discussions related to the Sensor Hub module) and Sensor Hub Module Notebook (for documentation related to the Sensor Hub module). For feature requests and bug reports see the Issue Queue for the Sensor Hub module on Drupal.org
This group contains discussion, to do lists, and documentation specific to the Drupal installation with Sensor Hub module at cloacina.sensorhub.org. This is one of the first Drupal installations with the Sensor Hub module and it currently has one active Sensor Board and one retired Sensor Board.