Even though the PlayStation Network is back online, users still have plenty of questions.
And you'll likely find an answer at the PlayStation Blog , where many of the more common questions receive replies; one of the most important is an answer to, "So what exactly is working right now?"
"Sign-in for PlayStation Network and Qriocity (including the resetting of passwords), online gameplay for PS3 and PSP, playback of rental video content on PS3 (if within rental period), Music Unlimited powered by Qriocity on PS3 (for current subscribers), access to services such as Netflix, Hulu, Vudu, and MLB.tv, “Friends” category on PS3 (including Friends List, Chat Functionality, Trophy Comparison, etc), in-game leaderboards, and PlayStation Home."
That's a handy list, isn't it? They also confirm that three update periods for the PlayStation Store were missed, and that means content like the MotorStorm: Apocalypse demo didn't make it. But all of that is coming and to help catch up, they'll be updating "multiple times per week" so everything gets back to normal ASAP. Also, Plus members shouldn't be affected too badly, as Sony will continue where they left off on the Plus content calendar.