AGEN, France, Oct 3, 2006 (AFP) - Six Britons and a Polish driver were arrested Tuesday for taking part in an illegal high-speed race across southwestern France reserved for the millionaire owners of ultra-powerful sports cars, police said. All were released after paying fines. The drivers were participating in an unofficial contest called the Black Carbon Rally -- a cross-country competition in which Ferraris, Porsches, Bentleys and other costly cars are pushed to their limits by their wealthy owners. The race involved getting from Kent in England to Milan in Italy, via Bordeaux, Barcelona and Geneva in the shortest time....