For the hotel offers you have to book two nights to get the free tickets. I strongly advise against the Yas Hotel, the after parties go on till 6am in the nightclub across the way and can be heard in virtually every room - unless you sleep through anything or take ear plugs. Then the cars start up at 9! Try the Rotana or the Crowne Plaza.
<em>edited by Chocs01 on 07/03/2011</em>
Have a look at the website for Yas Island but they normally the hotels on Yas Island do some good deals combining tickets, accom and breakfast for concerts. Unless you specifically want to come into AD then suggest staying on Yas Island for convenience.