If you monitor the SEM industry at all you may have noticed a lot of buzz the past week or so about reputation management. That is, using the web to influence your (or someone else's) reputation, either positively or negatively.
Reputation management can be a scary thing, when you start to think about it. Simply because it's so easy to manipulate search results to achieve your goal. Easy in that in many cases it is the number of links which ultimately affect your reputation.
Also known as Google Bombing, the idea is to build as many links as you can on a given keyphrase to artificially inflate your rankings to the top of the search results.