Drag&Share 2.0 is the first release of Drag&Share prototype fully compatible with Moodle. All the features are integrated (users, files, resources ...).
Available at:
http://prototypes.felixam.net/
Just install the module in your Moodle installation, and you will be able to insert the activity in your courses. Therefore, students will have the shared workspace available as activity to share and edit all kind of resources.
There is also integrated a rich text editor within the shared workspace, as well as the chat and other features.