I just cancelled my Delta Amex after 10 months (12.5K sign up bonus, first year no annual fee). I just got the Hilton AMEX offer in the mail - 7,500 points, no annual fee). Will they let me take this, cancel in x months, then go to the next program for their sign on bonus. I will never have 2 cards active at the same time.

The no annual fee makes this a no brainer if they will let me hop from program to program.