I agree with you, Malte. Maybe a start point could be contact Deirdre Kane and see how is going updating the user and administrator manuals written by Sloan for 2.1 and following
this discussion the manuals could be available in Word, PDF and HTML (and LORS!) format. Any notices from Sloan?
Dario Rog at Universitat de Valencia at Spain and people from aisec.net have end user manuals too in pdf and htm format. Bruce Spears have manuals and howtos in html. Bruce and Dirk were also scheming to build a little context-dependent help system into Dotlrn along the lines of Moodle's system. KNOPPIX cd has a demonstrator with a course in LORS format about building contents in docbook and then just package them as IMS CP i think using Reload Editor.
A clearly roadmap could be great to congregate these initiatives and open space for collaboration.