I noticed that as well. However, they seem to be friends / colleagues / associates. A web search for "Craig Hockenberry daringfireball" shows that Craig Hockenberry is (or has been) a contributor to John Gruber's show and John Gruber has recommended one of Craig's apps [1].

[1] http://safetylightapp.com/

And if you run it, you get the Daring Fireball homepage, which surprised me - it's not configured for this problem.