Scoop,
I second (and third!) many of the comments above regarding the 2x miles and WP miles devaluation and future upgrade possibilities.
The primary reason I am with NW/WP (currently SE) is because of the ample upgrade opportunities, ability to find award tickets without surcharges, and earn bonuses like 2 tickets for 19,000 miles with my WP Visa.
As with everyone else, I would appreciate as much clarification as possible regarding these and other merger concerns.