There's also rooms.aero.

Hyatt doesn't show availability in your initial search (when you see all the hotels in the area) or by calendar, just the cash price and minimum award price. You have to click through to the hotel's page to see award availability. Hotels can also have minimum stay rules for points bookings. It's a pain, definitely, but I can't help but think that the day they fix this is the day they move to dynamic pricing...