under the tab "game data" (I think) in the controller column on the PS homescreen. Select Dark Souls and hit the triangle button to get an option to look at "Information". It will have the patch listed there
You have to download the patch when it comes, which if your not in Japan, you don't have. That's how you know, and pretty sure everyone who did see the patch would jump and start dancing spontaneously and even a few would even cry for joy on here as soon as they got it.