I can't login to psn and my internet and ps3 are fine and I was playing for a while but then it kicked me off. So I think playstation is down. Also glad that I'm not the only one having this problem. Oh yeah if you do a connection test it will show you that Playstation Network : Failed.
Playstation is always so slow to notify on its blog or twitter. Remember the PSN outage of Summer 2011. :C