Just read that Sony has pretty much found the cause of the psn crash. It has something to do with the functionality and files of the system's internal clock. Something has corrupted and is now the cause of many problems. This includes the inability to sign into the psn and why many have lost trophies and lost games saves all together. Sony is now estimating a repair will be released within the next 24 hours. So luckily we won't be out of play time for long.