Vimes: The site that have other sites in an iFrame, according to DomainCrawler is located in USA. About this site I have to say that it also show my adsenses, but it have its own adsense in the top of the page.
vandread: I have good ranking position in Bing and Yahoo, but the 90% of visits used to come from Google :(
mhansen: I have other site too, wich was not affected by MayDay. The only different that it had with the affected one is that its content is not as coppied by other sites as the affected one, but it have the same company server, the same script (wordpress) and had the same template (I changed the affected site to make it faster).