http://www.uwm.edu/Libraries/courses/wiki/
This a free online screencast -- designed to review Wiki basics, the pros and cons of Wikipedia, and how you can use Wikis or set one up.
It's likely a review for most of the people on this list, but with the continued media flurry over Wikipedia's truthiness and the upcoming launch of Citizendium, it could be a useful pointer for fielding questions you may get about Wikipedia as a reliable information source.
Please pass this along to anyone you think might be interested.
Cheers, John