There is no doubt that this man has been successful and he seems to have changed the course of his life for the better. I am happy for him. However, consider the long term impact of cases like these. It's not about his success, it's about the type of behavior his success will inspire. People will look at him and they wont see someone who started his own company, they will see someone who made $250K in two months. Above all, people are attracted to short term profits (it's what got America into the current economic crisis). Someone who might have tried to start his own company will instead go for the quick profit creating Facebook and iPhone applications. He may be happy with his large payday, but the loss to society is large. At the end of the day, I'd rather have people starting new companies.
My concern is that cases like these will be sensationalized in the media and result in the incorrect perception that "social networking application things" are the best thing to go into. Hell, maybe this guy has real world impact. After all, people who don't normally play games are emailing him to tell him how much they enjoy it. But the way the media has presented his example will not inspire people to create value, rather, it will inspire them to go for the quick profit via the next big Facebook app.
I will admit I was a bit careless in my first post. Even entrepreneurs not skilled enough to come up with "the next big thing" should still strive to work towards solving real world problems. At TicketStumblr, you do have a real world impact. You are solving a situation that cause markets to fail: when people have incomplete information. Your service allows people to find cheap tickets because you give your users enough information to judge the market accurately. That is the type of real world impact I am talking about.