Sorry to interrupt the Uncharted codes, but here are some codes I found lying around.
The unlock points still work, but not sure about the rest.
Killzone 3 - Unlock Points
3835-NJNK-6A4A
NDTN-Q6NA-FQ48
Killzone 3 - Retro Maps
D2A7-47NE-TL4A with Theme
B3JM-8RNN-T7HQ with Unlock Points
Killzone 3 costume
5MFR-7GNL-85C2
Infamous 2 Sniper Blast
8JR5-4CND-7CKQ
Something for Tron
9MGC-F6N3-N8LB
Something for one of the older Madden Football games:
E5J6-PJBP-HJT3
This might be for anyone who has Shift since it looks like you have to enter it in the game not from the PS3 store.
Product Name: Need for Speed SHIFT - Porsche Cayman S Promo Code
Digital Rights: 7XB9-HLED-C8Q5-XPRY
This might be for SHIFT too.
COKE ZERO DODGE VIPER
Your digital code: 2GJ2-PMLZ-M2HH-N2FK
You must complete your first race before unlocking this car. You must be connected to EA Nation in order to redeem this code.