Bittorrent world connectivity map
The fine buccaneers at The Pirate Bay have published an interactive map of people seeding and leeching torrents around the world with data by country (percentage users and connections through country at a given time).
Great and fascinating snapshot of p2p activity globally. China is far and away the highest poller and well over 30% of world activity every time I've looked. Would be even cooler I think if you could divide this into seeders and leechers with these stats.