MGM has really good prices for various dates if you book the Ultimate Escape Promotion for Players Club card members
First $49 offer:
Name: Ultimate Escape
Description: Deluxe Rooms from $49 - $25 bar and restaurant credit - 2 free drinks at West Wing lounge
Valid: May 20, 2008 - September 30, 2008
Expires: May 31, 2008
Promotion Link:
MGM Grand - Ultimate Escape
The other $49 offer:
Name: Ultimate Escape
Description: Deluxe Rooms from $49 - $25 Entertainment credit (KA or Crazy Horse Paris) - 2 for 1 Grand Spa access pass - 15% off Spa Services
Valid: May 16, 2008 - September 30, 2008
Expires: May 31, 2008
Promotion Link:
MGM Grand - Ultimate Escape II
Source: Vegas Hotels Online