These are excellent pieces explaining wikis and RSS. Worth viewing even if you know what it's all about because it's a great example of how to communicate in a simple and concrete way the benefits brought about by a piece of technology or a by given solution. I have recently been involved in analyzing the reporting requirements for the marketing communications team of a customer and these videos provide great inspiration on how to explain issues and recommended courses of action... I did not say I'd make a neat video like this one though. Enjoy.
Wikis in plain English (The Commoncraft Show)
RSS in plain English (The Commoncraft Show)