A Bleg on Technology and Teaching

I'm giving a talk at APSA about the classroom use of Internet resouces, including social networking sites such as Facebook, Twitter, and LinkedIn. You are all cordially invited:

http://www.signup4.net/Public/ap.aspx?EID=MORT69E

Right now I would be grateful for any thoughts on how you use the Internet. What are your favorite sites? What online interactive resources do you find most helpful? How do you teach students the research uses of the Internet?