Hallmark has some great deals on their site currently.
There is a coupon for $5 off of a $10 or more purchase at the store. The coupon is good until 12/24. Could make for a great deal on some wrapping paper or Christmas cards.
In addition, there are a handful of online offers available (various expiration dates):
FREE EXPEDITED SHIPPING plus SAVE 30% off $50 orders
Save 20% on baby personalized cards and plates
One Year Unlimited E-Cards for $12