MGM Mirage today unleashed a series of financial initiatives aimed at bolstering its balance sheet -- and signaled its Bellagio and Mirage hotel-casinos won't be sold anytime soon. The hotel-casino and entertainment giant, based in Las Vegas and struggling in the recession to service more than $14 billion in debt. Today's news was not a surprise. After reaching an agreement to finalize construction financing for its $8.5 billion CityCenter project on the Las Vegas Strip, MGM Mirage was expected to focus on debt-reduction measures.