Hes corny and occasionally hokey. His sincerity seems too good to be true. Hes too nerdy to be cool. But WSB-AM (750)s CLARK HOWARD has earned his reputation as the most trusted public figure in Atlanta. He genuinely does care about the people who call his show with their consumer problems (or at least their spending habits), and he offers them sound advice. Hes already filthy rich and doesnt need the gig; he does it because he loves it. As a college student, Howard worked for Ralph Nader, an experience that has informed him ever since. Hes not afraid to take on the powers-that-be (his contract specifies there will be no sacred cows on his show). Although it pains us to admire a guy who eats bargain meals at Burger King and scrounges for bargains, Howards a rare treasure: If he says it, you can take it to the bank.