To begin you should look at the WebFlyer conversion calculator...

http://webflyer.com/programs/mileage_converter/

...which we give you an idea of how a conversion could be made and how much value will be lost in process. In this case you would need to establish a Diners Club Mastercard account, and will lose about 50%. Transfer 50,000 AA miles to Club Rewards in 2006, and the balance in 2007. The Diners Club annual fee is $95, but you will earn 1,000 bonus points per month for the first 12 months provided you make at least one purchase with the card in each month.