There are lots of sites that aggregate Las Vegas hotel promotions. Some that I visit prior to making reservations:
>
FatWallet
>
Casino Trip Reports
>
Las Vegas Hotel Discounts
>
Lasventions
>
Smarter Vegas
>
Vegas Hotels Online
>
Vegas Promotions
Unless someone wants to take on the task of aggregating the aggregators on a daily basis, LOL, not sure what is gained by attempting to recreate the wheel....