"We all know that "folk" music is actually a trademark of the British folk."

I've certainly have never heard that, and would dispute whether it is true.

"blues and folk music" seems to come up with Mudcat at the top, but "folk music" doesn't and nor does "blues". All very strange. Still it strikes me enough of us find our way here to keep it interesting and that's what matters.

And hunting around in Google I turned up some interesting sites I hadn't come across before - such as Folk Music Archives, which is well worth visiting, with interviews and pictures of various American folk musicians.