Googlegänger

Ever run a vanity search and found someone who shared your name but lives a very different life?  An article in Newsweek's technology section takes a look at how people are increasingly being defined by their Google search results.  With the term developed to better describe your search engine twin, a Googlegänger is "someone with your exact name (but not you) whom you find in an Internet search". 

How many of you have experienced this?  Were there any benefits to having a search engine twin?  Did you take any action to clean up your search results?  What do you think about people being defined by their Google results?