I'm normally not a fan of Gift Card, but since its a Wal-Mart gift card, thats practically cash since I always shop there for food :D
So here are some details:
Now there is some confusion, some sources (Here & Here) that are saying its a Blu-Ray Gift Card, but as you can see from Wal-Mart itself (Can't get much official then that) its a normal Gift Card.
To me, this sounds like an amazing deal until the holidays (Excluding MGS4 bundle)
Edit: Also, (I'm pretty sure) if you apply for a Sony Credit Card they give you $100 on your first purchase...Which would theoretically bring the PS3 to $199 ha...But hey, I might be wrong on this one...