I’m seeing well optimized one page Adsense doorway pages from many medium sized search engines gaining momentum in my areas. In fact one domain tool provider archiving copies of everybody’s site is beginning to compete with me on every keyword. All of these sites are typically concentrating on the index page of sites for rankings but a few are even dipping into the sub-pages of sites. I expected this to occur since Google is allowing pages from about any areas to compete in sections I frequent. Tough to compete against and tricky filing DMCA’s against search engines. Regardless of the reasoning it’s bound to be enriching Google allowing all this “passing off” to occur. Plenty of aged domains to deal with.