At circuit city you get a $10 gift card when you buy dark sector but other than that i wouldnt expect much for awhile. Also Ive seen ace combat 6 for $45 at my local compusa. Probably ymmv but worth a look if you have one near you.
Also saw on the frys ad thread that dark sector was being sold for $49.99 could be a typo and it said SJ only but might be worth checking out.