Orbitz - 10% off
The prices shown are the same as on Orbitz.com but when you book from this site, you get 10% back on your card after checkout. Usually within a week after checkout

Friends and Family Resorts
You have to book 7 days at a time, but the price it shows is for all 7 days (not per day).  So a lot of times it's still cheaper than booking a couple days at a hotel, and you don't have to check in and out on the first and last days. Check frequently, results change constantly.