At the risk of repeating myself from my other blog...... I would like to say that Gapminder are my most favourite people when it comes to information graphics. They did to graphs what McVities did to biscuits...... (chocolate hobnobs, need I say more?)
If you didn't get a chance to check out the interactive graphs, please do.
You can also watch a program he did with the BBC called "The Joy of Stats" on his website.