A compelling -- and long overdue -- mayoral race is shaping up in Scottsdale. Bob Littlefield is finally challenging incumbent Mayor Jim Lane. The one-time allies diverged over the past eight years, mostly over development issues. Littlefield toyed with challenging Lane four years ago, but a poll he paid for told him it was better to remain a member of the council for two more years than make an early, if principled, exit. From as philosophical, bystander role, that was too b