In my Web 2.o for Dummies posts I discussed Web 2.0 usage by commercial companies. The companies use Blogs, Virtual Worlds, and Wikies.
They use YouTube videos as well.An interesting idea of a mobile device application adding human memory in remembering
-->people is presented by a YouTube video made by IBM. It is also a good example of Web 2.0 usage by -->
example of Web 2.0 usage by companies.