Track of a spreading meme: the first person I ever heard use the expression it's all good was Jenny Reed, at NASFiC last August. I asked around a bit afterward, but nobody I knew had heard it before or had any idea where it came from. (Didn't think to ask Jenny herself, oh well.)
Then I heard Keith Gabryelski using it last week in Boston, and a DJ on the radio a few minutes ago.
That's an odd enough assortment of people I predict we'll all be hearing a lot more of this one in the next year or two. You heard it here first.