Our friends from the left coast at the UC Berkeley Library have used wiki software to create a congressional research tutorial called Congresearch. 

Congresearch includes Flash tutorial videos on finding a bill, a hearing, a congressional debate, or the like, such as this one. Over time, more tutorials will be added. The tutorial homepage also contains links to current congressional news, recent votes and a link to their customized Congressional Search Engine created with Google CSE to create a focused Google search on current official U.S. Congressional websites and news organizations focusing on Congress.

Props to FGI, Free Government Information, for spotting this.