The line began forming, almost inconceivably, at 11 Wednesday morning, 18 hours before doors would open. By 9 p.m., 40 people were waiting. By midnight, the queue wrapped all the way around Fisher Pavilion, the Seattle Center banquet hall. Hundreds of people waited, through the gloom of night and the sleepy dawn, not for concert tickets or a hot new restaurant, but for an X-ray, a root canal, ...