Love YouTube? And science? Try SciVee, a video-sharing site for posting science to the public. Sponsored by the Public Library of Science (PLoS) and NSF, it's a great source for finding videos for classes and outreach, or for posting your own research. Most videos are either companion pieces to journal articles or of equivalent depth, though there are also some very good pieces for more general audiences and outreach--such as JPL's "The Big Thaw."