Go to http://www.thesuperheroquiz.com/
OK, while not technically a business based blog post, couldn’t resist this one. Someone has built a quiz that will spit out which super hero you are most like as well as other related super heros. This site does pretty good business, is wrapped with google adsense ads and probably generates $20k per year while the author sleeps. This is one of the many reasons I love the internet.