Umm...yeah if you want to go rad onc or nuclear med, you better not just be an M.D. student, but be one of the best medical students applying in the entire match. It looks like there have been 3 nuclear med positions offered from 2000-2006 (only 1 offerred in 2006) and there were 17 rad-onc positions offerred in 2006. They all went to M.D. students, but then again there were 15,502 U.S. seniors applying (US M.D.) and 2,222 osteopathic students applying. If you're an M.D., I wouldn't plan on going rad-onc or nuclear med either without a good back-up plan.