It may be folk, but Philly rocks, for the 46th straight year, mixing traditional music with cutting edge innovation. The numbers this year are staggering - more than 50 acts provide some 55 hours of action, from bluegrass and folk to world and roots sounds. Dance and juggling leap into the mix, along with kids' cool stuff and learn-about-it workshops. -- Tracey E. Meloni (Photo: Courtesy G. Widman for GPTMC)