The C1-Holiday codes are expired, but I found these (no idea when they expire though):
10% off (upto $25) Coupon: C11-GIFTGUIDE
$5 off $50 Coupon: C22-GIFTGUIDE
$15 off $100 Coupon: C23-GIFTGUIDE
I used one today so I know they're working now. They're also supposed to be good for more than one purchase (separate transactions, not one transaction with more than one item). Don't know if that's true or not. Can a mod please move this over to the coupon board? Thanks.