I just bought 2 of this LivingSocial deal for the Hacienda Tres RÃos Resort (you can combine them to extend your stay).
https://www.livingsocial.com/deals/316040?deal_share=18797762&ref=conf-jp&rpi=57011648
The deal is only available for 203 more hours,
It's called "Only the Beginning on the Riviera Maya" We're going in December for wedding.
If you purchase please use the link above so I can get credit...
Thanks,
Tim