Mandarin Oriental, 12/5/09 to 2/28/10, buy one night, get one free plus $100 credit - use code LPKG10 online or over phone
I booked this online... the site didn't mention how much credit there was just that it was there. When I arrived they told me it was $50.
Still a good deal, one night plus $50, but not as quoted here on the site.
Also there is a crapload of noise outside the hotel. Noisiest hotel I have stayed at in Las Vegas. I will not return as noise is a big issue to me. Listening to some horrible music coming in through the windows and the floor is vibrating. Hotel said they would send security over to try to make them stop, I think that the people sponsoring the band are going to laugh.
Amex Platinum card holders are able to get a much better deal. Wish I knew before booking, could get the one night free plus $100 credit plus a room upgrade. I suggest using that if you have one and want to book this hotel.