Here is an example. Fred Wilson's visualization - http://weeplaces.com/fred-wilson/ http://weeplaces.com/fred-wilson/ Or Harj's - http://weeplaces.com/harj-tag

Here is an example. Fred Wilson's visualization - http://weeplaces.com/fred-wilson/ http://weeplaces.com/fred-wilson/ Or Harj's - http://weeplaces.com/harj-taggar/ http://weeplaces.com/harj-taggar/ - he checks into YCombinator a lot.