Netflix, which last week surprised analysts by reporting a 45-percent boost in profit, is likely to keep some of its distribution centers operating on weekends in order to keep up with subscriber demands for movie rentals. Problem, the U.S. Postal Service is considering a stop mail delivery on Saturday in an effort control losses that amounted to $2.8 billion last year and could rise to as much as $6 billion this year. (read more . . .) Netflix has created a system that surpasses the speed and quality of the USPS. Netflix is not delivery packages, but it...