Virginia Governor Timothy M. Kaine announced the official launch of “Virginia on iTunes U,”(direct link, requires iTunes) a dedicated area within Apple’s iTunes Store featuring free access to educational content. Through iTunes U for K-12 education, students, teachers, and other interested users can “learn on the go” by downloading audio and video content onto an iPod, iTouch, or iPhone from any computer with Internet access.
I recently came across a website offering short, easy to follow videos explaining various web 2.0 tools. http://www.commoncraft.com/show
They also offer videos explaining blogging, RSS, social bookmarking, and wikis.