I know the a lot of people in the Episcopal church seems to consider Taize to be "folk" - though I agree with kat - it doesn't seem "folkie" to me. There are a lot of hymns and psalms though that when you strip them down to bare melodies are "folk" in origin. I remember complimenting our organist one time on her rendition of 'Star of the County Down' - and she was amazed - because the music she was playing from claimed it as a musical setting of the 23rd psalm. (we compared the music a bit later - and she agreed - the composer used 'county down' as melody.)