Wife & I also received our "thank you" letters today. I called the #, gave my SS #, and the automated system said I was approved and my card would arrive w/in 10 days. Same results when I called on my wife's status.
We applied on 3/9/11.
The letter & disclosures also included the results of their credit pull from Experian, on 3/10, along with the actual number. Mine was a hair under 750 & wife's was a hair under 770.
Also it reiterates what we've read many times already: eventually they want a copy of "a current airline reward program statement as proof of your existing miles/rewards." My underlining.
It doesn't say they want a credit card statement.