if you fly NW a lot, you can STILL get a worldperks visa with the bonus miles, but do it fast because offer will go away soon. NW and Delta is merging their programs sometime in the fall. Right now if you get your worldperks visa with the bonus and worldperks account, then you can just open a skymiles account, and transfer miles back and forth between Delta and NW at your choosing for free. When the eventually merge the 2 programs you keep all miles, you won't lose them, but they'll become Skymiles. Worldperks is being phased out. Plus they'll waive your worldperks annual fee on their visa. (U.S. Bank). Since US Bank no longer will be part of the new Skymiles/Delta association, they'll probably do a product change to your worldperks visa at that time (merger complete...later this year).
Just keep in mind, Delta's skymiles program is horrible compared to worldperks as far as fees/availability of award travel etc., hopefully the 2 merged programs will be a better program...(otherwise my 200k+ miles on NW will be spent before the merger is complete).
Amex will be/is exclusive to Delta so if you want you can also apply for their Delta card with 25k bonus miles. (unless you hate Amex...).
hope this makes sense, it's a little late here hah
good luck
