Twelve-year-old Ilana Wexler was hanging out at home in Oakland's Rockridge district Wednesday when her friend called to invite her out next week. Her friend: Teresa Heinz Kerry, wife of Democratic presidential candidate John Kerry. The invitation: To address the Democratic National Convention -- and the nation -- during prime time Tuesday night. "I was like, 'Oh, my God,'" she recalled Friday during a telephone interview from her grandmother's Brookline, Mass., home, where the national media were beating a path to her door. "I don't know what to think. I'm just totally blown away." Ilana truly will have something special...