I’ve been a fan of the commoncraft videos since I saw my first one about a year ago on RSS in Plain English. The videos they create are simple, clever, and short making them a great resource when you want to get a point across. Their newest one explains Online Photo Sharing through flickr. Others that might be of interest to you or to your students include:
- Blogs in Plain English
- Social Bookmarking in Plain English
- Social Networking in Plain English
- Wikis in Plain English