Describe SoftwareFreedomDay/Documentation here.
Open Office Documentation
These are sites where you can find documentation released under the "Creative Commons";
http://creativecommons.org/ licenses so you are free to use and redistribute them.
"Tutorials for Open Office";
http://www.tutorialsforopenoffice.org/category_index/Index.html "The International Open Source Network";
http://www.iosn.net/training This is linked from the SFD site. "The International Open Source Network Provides many training papers including for OpenOffice";
http://www.iosn.net/training/ "ItrainOnline Multimedia Training Kit";
http://www.itrainonline.org/itrainonline/mmtk/ have lots of trainer and end user docs in both OpenOffice and PDF format, including a wham-ban-boogie full doc all in one zipfile download. Again CC license.
Other Documentation
(to follow)