Former San Francisco Supervisor Tony Hall spent thousands of dollars for thank-you dinners for his contributors -- but a woman who helped raise that money says the only thing she got was a fat headache, and now she's threatening to sue. "He stiffed me -- I didn't get paid a dime,'' said Julie DeGregorio, who worked as Hall's fund-raiser earlier in the year as he was contemplating a re-election bid to the Board of Supervisors. Even more embarrassing, DeGregorio says Hall was dialing for campaign dollars right out of his Board of Supervisors office. How does she know this? "Because...