Popularity of running in the DC area has now surpassed ridiculous. Marine Corps Marathon just sold out 30,000 slots in 28 hours (12,000 in the first hour alone), 2010 Army Ten Miler sold 30,000 slots in 35 hours, and the Cherry Blossom 10 had to go to lottery a couple years ago. Sign-up day is getting more stressful and competitive than race day.