Has anyone noticed how Google searches have gotten worse in recent times? Here's a roundup of some of the SEO/spam/content mill issues.
There was also that NY Times article about a vendor who gamed the rankings by getting as many negative reviews on consumer sites as possible (Internet research is the main focus of my online class, and it really can be challenging communicating what is going on online, particularly since these issues aren't well-known amongst the general (and even academic) public. The main thing I was emphasizing this semester was how important it is to think about what is going on when we search (where was it published, what kind of site hosts it, who wrote it originally).
There was also Google fixed this a few days later by essentially blacklisting the guy's site, but guess what? It appears that NY Times coverage (a reputable site, of course) has bumped him back to the top: http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=%E2%80%9CChristian+Audigier%E2%80%9D+glasses