Blockbuster Express offers free overnight rentals with promo codes on their $1/night rentals if you return by 9pm the next day. These are not valid on higher priced rentals, but there is a big selection of these $1 rentals. Check your local Safeway for a Blockbuster Express kiosk and have a movie night for free!

Here are some promo codes that expire September 16, 2011:
3TTDR8
23PGAR7
52KRVF7
48RMAQ5
79AGSF6
48TPLD5
26MMKC3
99JMMF9

Thanks SavingsLifestyle!