Update: I'm also adding Big Fat Blog, an obesity-acceptance site, because I think it's entertaining.
Good news: Chicago's CTA and Pace (suburban) buses will have wider seats starting next year. They're going up from 17.5" (44.45cm) across to 18" (45.72cm) across. Despite the small increase, this will make Chicago's bus seats the biggest in the nation.
Despite the few spoil-sports quoted in the article (Dave Grotto, a dietitian and spokesman for the American Dietetic Association, who trots out the "Fat people are costing us more in healthcare, and now we're seeing the result of the obesity epidemic" whine), I see this as a positive move.