- Twitter(Length of Response, User's coming up with new uses for service)
- Youtube (Video response and in-site recording)
- Youtube Streams - Real Time chat around youtube videos. Very cool in concept, a little clunky in reality.
- Blipback
- Ted Talks
- Big Think -Great videos with some expert voices
- 5min- Instructional Videos
- Instructables - Short Instructions that are powerful
- TEDx - Do it yourself TED conferences
- The PEP Talks - Passion, Experience, People (videos and presentations for students)
- Klustr - The closest things to an interactive decision engine and collborative ratings system I have seen. Not realized, but cool idea.
- Dotspots - Adding a "DOT" to any news article so that you are adding content to the story. It will show up for anyone viewing that article (and possibly wherever the article shows up on other sites too).