Well US will be ordering 20 A350s since Airbus has approved financing for their merger with HP. So that makes 30 orders.

If they plan to get 100, that means EK will buy the A350 and they probably also landed GF, as well, since GF wanted a larger 787. However, both might have required Airbus to build an all-new plane which means they will not have it ready by 2010, so 787 will have a 4-5 year lead (though that does give Airbus some time to see what is working and not on the 787 program and adjust accordingly).

Britain has confirmed launch aid for the A350, but the US will contest it (probably in the WTO).

As for UA and NW buying the A380, I can't see it happening. BA, CX, and LH would be the most likely launch customers for the 747A, so I expect if they want it, Boeing will formally launch the 747A at Paris.