Bobad, you're right. The article is just going through its birth pangs at the moment and will expand in time. I did mention both British Folk Music and American Folk Music to distinguish between the two forms, and those phrases will link to an existing Wiki article, probably "Folk Music", where they are both explained. I intend mentioning also other cultures that are discussed on the Forum or represented in the database.
I'd like to get the go-ahead from some of the individuals involved in the site's creation before mentioning too many names--some folks may not want their names on Wikipedia. This means PM'ing a few folk.
There will also be other language versions of the Mudcat Cafe article (eventually!).