I loaded up Visitors today on burtonini.com to see what was going on, and discovered that I've got 12000 referrals from a single domain, which I didn't recognise. A few minutes later, I discovered that several users on xanga.com are using photos I have taken as web page backgrounds, from my site.
A quick google later, and I've got some mod_rewrite magic going on. Get off my land!
NP: Keep It Solid Steel, Mr. Scruff