Some related posts from Technorati and Google.

 [Battellemedia.com] John Battelle's Searchblog: WSJ Discovers Referral Spam: I thought this line was interesting: "This is not the search spam of the early Internet, where you would search for "Disney" and instead get a sex page." I think most search engines are doing a better job with that type of spam, but they also need to be looking forward to what people will be trying next.

[Wild-mind.net] Wild Mind » Referral Spam: I’ve found a piece of code to ward off referral spam, thanks to John Sinteur known as .Here is another blog fighting the referral/comment spam problem.

 [Ducttapemarketing.com] Duct Tape Marketing Blog - Voted Best Small Business Marketing Blog: Referral Flood - How to create a flood of new business without spending one dime on advertising - by John Jantsch

Reflected tags on Technorati: Blog, [Technorati] Tag Results For Search Engine, Referral Spam, Targeting Spam