I started seriously thinking "bubble", when someone I know who runs a moderately-successful, very small Groupon clone, decided to launch an incubator.<p>Maybe that's not the sign of a bubble though. Maybe it will be a bubble when someone launches an incubator for incubators.
Very funny quote from the article:<p><i>"August 2011: Your accountant, your Uncle Sal, and the garage attendant at your office building all confide they are cultivating start-ups on the side."</i>