Well if your 37 then its a fair chance you've heard of Womack and Womack? I'm 38 and also havent heard of Womad. We must be getting old. Stick on the Shakin' Stevens LP at 33rpm Matt, lets have a party!
Swizz as Jack D said it's a world music festival - so it features musicians, singers, dancers etc from various countries. Very good for anyone into that kind of thing, or people curious to find out - it's a friendly low-key festival that's smaller scale than most.