Can't post in Fly Board
Make your first Buy Miles purchase between August 1 and August 30, 2008, and
we will give you a 100% mileage bonus with your transaction. That means
that if you buy 10,000 miles, you'll get an extra 10,000 miles for a total
of 20,000 miles! http://www.delta.com/skymiles/buy_transfer/buy_miles/buy_miles_lto/index.jsp