'Gospel music is good news - we've had enough "bad news".' But Thomas Dorsey, grandfather of gospel, also remembers 'I've been thrown out of some of the best churches in America!' However, today gospel music is big business from the foot-stomping services of America's black baptists and the political rallies of Martin Luther King, to the superstar of last year's 'world's greatest gospel show'. But is the faith that inspired the great names of the past still burning as brightly?