I also got screwed with this promotion. I sent in four ps2 games, all in working condition with no visible scratches and all with manuals/cases. Just got an email today saying they received my games. Three accepted, one rejected ("Damaged Item" is the only explanation they gave). I called...
It's not that B&N sent the wrong SKU, they had the wrong description. There is no used guitar hero SKU at gamestop, so there is no correct SKU B&N could send. As far as I know, it could be gamestop's fault for providing a bad description.
Same here, after talking w/ two reps today, no luck in getting the guitar. The used guitar controllers are on major back order and they wouldn't send me the new bundle or even let me buy the new bundle at a discounted rate or anything. The explanation I received was that the SKU that BN sent...