that offer your referring to expired on 5/17/08.
Here's a current one
MGM Grand "Summer Splash!" Rates from $69/nt. *Plus, $35 Activity Credit towards dining or entertainment, Two Free Inner Tube Rentals, 15% off Spa Treatment, $50 upgrade to Celebrity Spa or Hollywood Suite -based upon availability at check in (*See site for additional details). May 16 - Sep 30, 2008. Promo Code: INB174 (Exp 6/2/08)
Las Vegas Hotel Promo Codes Promo Code: INB174