(MGM Mirage article updated with additional analyst commentary on MGM's sale.)NEW YORK ( TheStreet) -- MGM Mirage ( MGM) -- it is now official -- will sell its 50% stake in Borgata after reaching a settlement with new Jersey. Under the settlement, MGM's stake will be put into a trust and sold within the next 30 months. It will also sell 40 acres of undeveloped land. This will leave MGM with 90 acres of land that it will also consider selling.