Every Sunday in December (and the first Sunday in January), you can get a free rental from Redbox locations inside of Walmart stores. All you need to do is use the code specific to the Sunday you are renting on.
The codes are:
12/07/08 - 11MOMS4US
12/14/08 - 11MOMS4UA
12/21/08 - 11MOMS4UN
12/28/08 - 11MOMS4UT
01/04/09 - 11MOMS4UA
Notice the end of the code spells out "SANTA" across all 5 weeks. So, enjoy the codes courtesy of Redbox, Walmart, and the Eleven Moms.
And remember, these codes only work at Walmart locations on the Sunday specified