If funtrepreneurship doesn't work out, there's always the more time-tested consulting version, the funsultant. Or, when all other options fail, the default, funemployment...

(Yes, these are all actual words people use, though for different things. Punning on "fun" seems irresistible. With apologies for the self-link, more on the 2nd one: http://www.kmjn.org/notes/funsultants_and_gamification.html)

I don't see a problem with the name of his blog... putting the fun in entrepreneur. It does appear to be the first post but maybe I'm not familiar with how Tumblr works.