PSN Global Bug

It appears yesterday evening, the PSN had a global crash that has caused a few problems for older models of the PlayStation 3. Sony has acknowledged the problem both on their blog and Twitter, which state essentially the same things, and do not share much information:
We're aware that many of you are having difficulty connecting to the PlayStation Network this evening. Those of you with "slim" PS3s (the 120/250 GB models) appear to be unaffected.Know that we have narrowed down the issue and have engineers working to restore service even as you read this. We apologize for any inconvenience this may cause you, and genuinely appreciate your patience while we work to resolve this.
Before their acknowledgment, it was left to forums and other blogs to get this information out, which left users coming up with mobthink queries and possible scenarios. Ranging from calendar and clock bugs (some users noting this occurring when the month switched) to more nefarious problems, one solution or consensus has not been reached; regardless of what is causing this, at the moment please be aware that if you do not have the new Slim 120/250GB model, you may experience problems.
What problems?
Beyond just connecting to the PSN, this includes not being able to access some single-player games. Heavy Rain has been cited among the games that has had difficulty being played. Some users have also reported Trophies simply disappearing, though at this point we do not know if it a permanent or temporary bug.
Sony suggests following their Twitter for more information on the ApocalyPS3, as many have started calling it.








It seems to be working now. Sony hasn't officially posted anything yet, but I was having the errors all last night and it's working now.
An issue though: a bunch of my trophies are missing. On Saturday my system said I had 20% of the trophies in Heavy Rain, now it says I have 7%. My save file is still there, so I can go back and replay the chapters (which I was going to do anyways for different endings and more trophies) but it's kind of a pain to re-get the ones I already had.