Hyatt is running the monthly 48hoursale on
http://www.hyatt48hoursale.com/.
Offer valid for bookings only between 12:01 a.m. on August 19 and 11:59 p.m. on August 20, 2014 CT, for travel between September 3, 2014 and December 2, 2014 at participating hotels and resorts in the U.S., Canada, Caribbean and Latin America
Unfortunately there is not (yet) a list.