Right now my PS3 is having difficulties signing in to the PlayStation Network. Has anyone found an official status page for the PSN?
A quick google lead me to this post which is concise. I'll quote it here for others.
Servers are not down, atleast not on my end. Check your internet connection settings on PS3.
For future reference, Support page gets an update if network is down.
Also, Playstation's Twitter account also gets an update alongside Playstation Blog.
EDIT: For a more visual answer, look at the bar on top right. PlayStation®Network On
So in short, hit up this page, and check the top right hand corner, http://uk.playstation.com/psn/