Spammers have created millions of Web logs to promote everything from gambling Web sites to pornography. The spam blogs — known as “splogs” — often contain gibberish, and are full of links to other Web sites spammers are trying to promote. Because search engines like those of Google Inc., Microsoft Corp. and Yahoo Inc. base their rankings of Web sites, in part, on how many other Web sites link to them, the splogs can help artificially inflate a site’s popularity. . .
Just this past weekend, Google’s popular blog-creation tool, Blogger, was targeted in an apparently coordinated effort to create more than 13,000 splogs, the search giant said. The splogs were laced with popular keywords so that they would appear prominently in blog searches, and several bloggers complained online that that the splogs were gumming up searches for legitimate sites.