"ShopWiki actively crawls more than 180,000 online stores to ensure you’ll find the products you want at the best prices." For a class looking at web2.0 apps, it's the kind of thing students would enjoy playing with.
useful for teachers making clips to analyze in class; "personalize any video with your story. With visual spotlights, you can narrate your personal videos, add captions or subtitles, or comment on any scene."
I have not tried it yet but am interested in the arrival of word processing, video editing, and photo editing tools to the web. This one has an intuitive interface.
like postsecrets but in prose; "type a note about a fault of your own, something you did or thought about and are not proud of"; filters out obvious lies, overtly vulgar, identifying specific others.
the various programs are on many topics of media and mass communications; available in audio, video, or print format; good overview of contemporary media issues by academics and practitioners