Brian Solis and Jesse Thomas have created an information graphic called “The Conversation Prism” sorting and categorizing an extensive range of webapplication. The Applications represented by their logos are arranged in a circular, flower-like structure. Each leaf represents another media or focus group and holds the major players of this field. The leaves are color coded and thus grouped in larger divisions.
The visualization would make a posh interactive applet. We could imagine details on demand for each service, dynamic loading of example content from these services (as most of them have public APIs nowadays), filtering based on business model, sorting based on traffic or active users etc. The static visualization gives a good overview and does a great job in the categorization – with a well thought trough interction model the idea behind the visualization could be taken to the next level.