Don't forget: PSN goes offline for maintenance today
After an outage last night, and spotty service as little as eight hours ago, it appears PSN is back online per the service page - and just in time for the scheduled maintenance period.
The network will be taken offline at 9am PST/12pm EST/5pm UK.
Sony expects the downtime to last around 4 1/2 hours, so plan accordingly.
As always, more information can be found on the PlayStation Knowledge Center and through the AskPlayStation Twitter.
Update: The maintenance period is over; you should now be able to get back online. Restart your console if you experience issues.