If you want to see pictures and videos of the Hurricane Wilma destruction go to
http://www.entertainment-plus.net/index.cfm. Looks like the beaches are gone in front of the Casamagna and the JW. Seawall appears to be collapsed at the Casamagna. Brandt does an excellent job keeping people informed about Cancun.
I was there last May (05) and my favorite beach chair location appears to be about 30 yards in the water.
We were suppose to go to Camcun 10/31 to 11/08, but transfered to Puerto Vallarta Casamagna. Lovely hotel, great service but the beach does not compare to what use to be in Cancun. Just a word of caution in PV Casamagna, Check your bills! I was charged for an included breakfast, did not receive a $100 resort credit and the front desk does not know the difference between a 100 Premium Pound and 100 Dollar Bonus Buck. I received credit for $400 USD after presenting 4 100 Premium Pounds. I'm still fighting with them over this.