Get up to 50,000 Bonus miles when you sign up with Delta Skymile AMEX.  The problem is getting approve for the Card.

You can earn up to 50,000 bonus miles – more than enough for two round trip Award Tickets. You can earn 25,000 bonus miles with your first purchase.  Use the Pay with Miles feature on Delta.com to redeem for any Delta or Northwest flight by 8/24/09 and we’ll refill your account with the miles you used – up to 25,000 miles!  Plus, pay no annual fee for the first year – a savings of $95.