I attempted to purchase NBA 2k12 last night at around 11 PM and this morning at around 10:30 AM EST. I used the same credit card I have used for other XBLA purchases. I attempted to use my debit card to make the purchase.
Same error message:
Xbox LIVE Marketplace
"Can't Retreive information from Xbox LIVE. Please try again later.
Status code: 8016CE52