Movers 2.0 is another sort of Web 2.0 directory that tracks the traffic trends by using the alexa API. In addition graphs are extracted from compete and other data is extracted from Google and Google blog search. The Web 2.0 tracker was developed by Eran Arkin a member of the eSnips team in his spare time. They do have a minor bug when more than one graph is opened together (see below). I really like the site it's a nice toy but I would be happy to see a compare feature that allows to select a number of sites and compare them side by side.