You can get a Free Blockbuster Express Rental when you use code 21CHD3X at one of their kiosks. This one should be valid through 1/28/11.
Thanks, Couponing For 4!
You can use the Blockbuster Express Kiosk Locator to see if there’s one near you.
Please note: At times they expire these codes early. So try them knowing that there’s a chance they may no longer work.