Date: 07/03/07 (Java Web)    Keywords: web, yahoo, google

Google and other major search engines (Yahoo, MSN Search etc.) which use back-links for importance calculation of a web page suffers from a fundamental flaw. Back-links can be manipulated and even purchased. While Matt Cutts claim that they can be easily identified manually, I think it is a hard problem to solve algorithmically and hence to [...]

Source: http://blog.taragana.com/index.php/archive/mega-challenge-for-google-search-engine-text-link-ads/