Syd Barrett, a founding member of Pink Floyd who wrote the bulk of the legendary UK rock band's early material, died Friday. He was 60. The exact cause of death is unknown, although Barrett was known to suffer from diabetes and had battled various forms of mental illness for years, with many fans speculating that his years of heavy psychedelic drug use had sent him over the edge. Barrett had lived a reclusive life since the 1970s, living at his parents' home in Cambridge. Word of Barrett's death spread today, and the band--David Gilmour, Nick Mason, Roger Waters, and Richard...