Orbitz cuts 20% off select hotel stays via coupon code "XLMBAM". It even stacks with sale offers, which are already marked up to 50% off. That's the best percent-off discount we've (dealnews) seen from Orbitz in over a year. Additional taxes and fees apply. Book by August 13 for travel through September 10.
This is a huge discount. As a test, I searched for the best price on Hotelscombined for a hotel in Melbourne next Friday night (Radisson Flagstaff). The best price was $199 AUD through Agoda. Using Orbitz with the discount code, it came to $168.91 USD ($161.94 AUD).
Orbitz is a big travel booking site in the US.
EDIT: Note, it doesn't work with some big chain hotels (IHG, Accor)