Any statistics on usage of Bitcoins by region or country? I would like to know if there are any statistics on turnover of Bitcoins for each country in the world. A very rough way would be to get a statistic on which traffic to Bitcoin.org by country.
WebGL Globe shows bitcoin nodes seen during last 48 hours. Install Chrome Web browser if you have problem rendering WebGL. 

Google Trends has countries, cities and languages sorted by number of bitcoin related search queries.