We decided to rebook with the Wynn as well. Hotwire really has been accomidating about this. When they called, they asked if we had other reservations and if they had any cancellation fees, etc. I hate giving them money, but at the end of the day, we really wanted to stay at the Wynn and it's a better bang for our buck than Planet Hollywood. That said, I talked to customer service at around 6:30 last night. I've yet to receive email confirmation of the rebooking at the Wynn, it also hasn't yet been charged to my credit card. I'm holding on to my other reservation until then.