I will be keeping up with Sony's tweets and posting them here
1)
We're aware that many of you are having problems connecting to PSN, and yes, we're looking into it. Stay tuned for updates.
about 5 hours ago via web
2)
PSN status update: We're narrowing down the issue and continue to work to restore service to all. Updates as soon as we have them.
about 2 hours ago via web
3)
PSN status update (part 2): Readers/followers are confirming that "slim" units (120/250 GB models) are connecting normally.
about 2 hours ago via web