Don't know how many here might be interested, but I am on the mailing list for eFolkMusic, and I received an email today announcing they are changing from a commercial music site, to a non-profit music site "with a mission to support appreciation, preservation, and performance of traditional and contemporary folk music from around the world..."
The site currently offers MP3s, reviews and previews, discussion forums, search engines for finding music you are looking for, artist services, and a whole lot more. It is a good resource for folk musicians and music lovers. Enjoy!