Where in the World?

I've found this web thingy which is quite interesting. Whenever you read my site a little server thing updates and now I can plot my readers around the globe.

I'm planning to use this technology to turn up on your doorstep and say "You read my blog - therefore you owe me lunch......"

I'm not quite sure how it works, and it seems a bit random to me (it put Sheffield in the middle of America) but it is quite fun. Take a look here to find out if you've been tracked.