No good way to do this without a HUGE devaluation!
http://www.webflyer.com/programs/mileage_converter/
Why not just use the AMEX points to claim a Hyatt Stay Certificate. Not the best redemption of points but way better than trying to transfer them. Be sure to check which hotels require which Certificates!
http://www.membershiprewards.com/Cat...d=104&pid=4533