PS4 users experiencing PSN connectivity issues [Update]
Update: And just like that *snaps fingers* it's back up. Original story below.
Sony has received reports that some PlayStation 4 users are experiencing issues with PlayStation Network which it is currently looking into.
According to the PSN status page for the US.
Affected services on PS4 include: "issues launching games, applications, and/or social features such as trophies, messaging, or friends list."
Other services appear to be up and running.
Keep an eye on the status page linked above for more information.