EDIT: As Josey pointed out in the comments, I'm an idiot. This code is for a BOGO rental, not a straight up free rental. I apologize for not spotting this earlier.
I got an e-mail this afternoon with a free Blockbuster Express Rental Code. It doesn't look like an exclusive code, so enjoy a free movie on me. Just make sure you don't use it tomorrow night because that's when Lost's final season premiers. I have a feeling my posts tomorrow are going to be nothing more than “OMGLOST2NIGHT!”
The code is GW12B1 and expires on 2/8/10.