Luckily I check all my entries but yes, I've had a visit. Canadian IP (126.96.36.199) but that doesn't mean anything these days.
All those with AtProxy lists can add his adsense pub code - pub-5879409938027710 - to the 'string blacklist' page in admin - problem solved
EDIT: I've just done a whois and his details aren't masked, I don't know if they're correct but they're not private. 'Proxymeister', lol.