FlyAA757, have you read the newest version which is online? In this Marc tell what the assumed customers for these undisclosed Boeings are:
Undisclosed [15-Dec] customers have signed for 3 B736, 36 B737, 17 B738, 1 B744, 8 B752, 10
B763ER, 2 B772 and 2 B773. This sums up to 79 orders. Assumed customers are SAS (3 B736), China Airlines (5 B738), Delta (1 B738 and 1 B752), Istanbul Airlines (B738), Turkmenistan (1 B752 for Jan-01), Flightlease (4 B763ER), Continental (2 B772) and Asiana (2 B773 and 1 B744).
Other airlines are listed as disclosed on the site.