I know I probably already posted on this, but doing it again can't hurt! In the line of visual facilitation using video, CommonCraft wins the simplicity and educational prize. On there wonderful site are all sorts of explanatory video which help make sense of things like RSS feeds for those of us who have to wonder… Their use of cut-outs filmed as the are moved about on a white space with an attractive finger is a nice combo of high tech and stuff cave-people did too… I didn't even know social bookmarking existed! For me, the only less appealing aspect is faceless people! Makes me feel I'm in a painting by De Chirico.
Sorry, unable to include a video, the CommonCraft link refuses to work. Below a screen capture.