Collaborative online tools

Thinktank and Openmute (Laura Oldenbourg, Inga Zimprich, Simon Worthington) will introduce to Thinktank - a drupal adjustment offering simple to use online working environments for free to collaborating groups. Thereafter we'd like to discuss possibilities of knowledge sharing over the web and possible scenarios, usages, applications and extensions of Content Management Systems (CMS) such as drupal.
http://www.openmute.org/