The big patch (v1.04) for the PlayStation 3 version of NBA 2K12 is now available. As long as your PS3 is connected to the Internet, you will be prompted to download the patch automatically when you start the game. According to this Tweet from Ronnie 2K, the Xbox 360 patch is expected to be available within the next 12 hours, while a third roster update that will bring the total number of rookies to 20 is expected to go live within 48 hours.
You can check out a list of the changes made by the new patch here. As I mentioned in the previous bulletin, there is currently no ETA on the PC patch but as soon as 2K Sports releases any info we will be sure to post it.