Following news that Al Gore and wife Tipper have purchased a multimillion dollar condo at the new St. Regis highrise in San Francisco, well-heeled home buyers throughout the city are clamoring to join the neighborhood. "Ever since people learned that Al and Tipper Gore were moving into the St. Regis, I've had three times as many inquiries about the place," says Damion Matthews, a realtor specializing in San Francisco's luxury condo market. "There's something about living near a person so powerful and important that really excites folks," he says. "A client of mine just moved into the swanky Four Seasons...