Many users are reporting inability to use some features of the PlayStation Network at the moment, like the friend list and online gameplay.
While the PSN Status page still shows “Heavy Network Traffic,” Sony has aknowledged the issue on Twitter, advising that its engineers are working on solving the problem:
We're aware that some players are seeing drops on PSN. Engineers are on the case and investigating.
— PlayStation (@PlayStation) January 7, 2015
Hopefully the issues will be solved quickly enough this time around.
Update: things are normalizing on our end, so the problems may be on the mend.