In addition to Wal-mart's Thanksgiving Day deals they are also having additional secret in-store Black Friday deals.

Earlier today the Secret in-store deals page for Saturday revealed a 80GB Sony PS3 that comes bundled with 10 Blu-ray movies. If you add the 5 Blu-ray movies you get from the Blu-ray mafia, you will have started a sizable Blu-ray movie library. There are only two such bundles per Wal-mart store though.

Right now the revealed secret offer is a KitcheAid Standard mixer for $139 for Friday and a $25 deal on the WowWee DragonFly.
All Secret in-store Wal-mart deals will be revealed on Friday. Like Best Buy, Wal-mart opens store doors at 5am on Friday.
More details on Wal-mart.