Web 2.0.

Web 2.0

The image to the right, came from Wikipedia

-- September 30, 2005, Tim O'Reilly wrote a piece summarizing his view of Web 2.0. The mind-map (constructed by Markus Angermeier [1] on November 11, 2005) sums up some of the memes of Web 2.0, with example-sites and services attached.

This mind map is very similar to tag clouds.