My boss is trying to setup a wiki for us to use inside of sharepoint. It is coming along nicely.
But when I got back from lunch today he sent out an email with this video inside entitled Wikis in Plain English.
It was a good short video on how a wiki works.
After it was done I went over to the main site http://www.commoncraft.com
And I saw a great video called Zombies in Plain English.
Enjoy and don't become zombie food.