In case you missed the banners on every major street in town and the commercials on KNBC, it's time for the LA Marathon. Even if your idea of a workout is walking to the TV when the batteries in your remote die, this event is likely to have an impact on your life. About 26,000 runners will pound 26.2 miles of pavement on Sunday morning. That's right, 26.2 miles of street closures for just the......