I'm sure you've heard of the Six Degrees of Kevin Bacon. It's based on a theory of Six Degrees of Separation, "the idea that everyone is six or fewer steps away, by way of introduction, from any other person in the world, so that a chain of "a friend of a friend" statements can be made to connect any two people in a maximum of six steps. It was originally set out by Frigyes Karinthy and popularized by a play written by John Guare."
This phenomenon also happens in the fly fishing blogosphere. Take my most recent experience. I talk with Emily Block the writer for the blog Mysteries Internal from time to time. I was looking for suggestions on artists who specialize in fishing. She recommended Becca Schlaff. I contacted Becca and asked if she had a design my TU Chapter could use for T-Shirts. She generously offered a brown trout design.
I recently got the shirts done and posted a picture of the shirts on Becca's facebook page.
I found out later that apparently this design was inspired by a fish caught by the author of the blog Fontinalis Rising. It's interesting when you think none of this may have happened if fly fishing blogs weren't around