It's not down.
Yes it is. Might just be a regional thing then.
I just tried to access the Plus section and I got the message "Unable to Access Content" several times trying to get Sleeping Dogs and some discounted items. I exited the Store, and went back in and now I get "Store is Under Maintenance"
Something is probably wrong with the servers because @Playstation tweeted that the forum was experiencing diffuculties.
I get you so horked up