The size of the country represents the relative amount of oil reserves in each country, and teh color of the country represents how much oil is consumed by that country.
Entries in Digg (13)
This one is really interesting. Stamen Design took one day of digg.com and visualized the user activity. The explanation is really cool, and can be found here on content.stamen.com. Stamen works with Digg on a number of the tools available in Digg Labs.
Red dots represent people that have been on Digg for a while, yellow is a good mix, and blue is new users. So when a story is predominantly blue, it represents a story that is attracting a bunch of new users to Digg.
If you don't read Digg...shame on you.
For the rest of us, Digg has become an incredibly valuable source of information. But paging through pages of text for something to catch your eye gets old quick.
Digg Swarm was launched in 2006, and I have increasingly used it more and more since then. It has really grown on me. You can watch in real-time stories that get "Dugg" to become more popular. The visual size of the story bubble grows as the story's popularity grows. The yellow dots connected to the story show you who is digging the story, and the size of the yellow dot shows you how important that user is in the Digg universe.
Also, if the same person Diggs two stories, a connecting line is shown to highlight other story bubbles that may interest you. The connecting line between two stories gets thicker as more users Digg the same two stories showing a stronger connection.
Usually I start it up and let it run for a little while before I check it out. That way it has some time to build up some connections and story history. It starts from scratch when you start, so you only see the stories that are Dugg from that point in time and after.