I just found this deal. This week if you buy 4 post cereals you get $4 off your current order, plus you get a catalina for $4 off your next order. Here is a link to print a coupon for $2 off Post Trail Mix Cereal. It allowed me to print it 3 times and I have already printed it before:
So depending on how many times you can print it, you could get very cheap or free cereal. You must buy 4 cereals for this to work.
Also, FYI, some Martin's Flyers are offering dollar doublers this week.