It's spreading. :-( Well, moving. The two Russian hosts aren't trying anymore, instead I've got a third in Turky, a fourth in Montreal and a fifth somewhere in the US Midwest. They've been blocked similarly.
My guess is someone has assembled a list of open resolvers and mine got on there. Now it's being distributed and people are using it. I might have to those dastardely resolutions, after all. That would still let anyone resolve my domain name but give them hell if they try to treat it as a open resolver...
Wade.