As you can see, this answer is better .... i have a ps3 and my PSN is
ps3 will be restored soon, Sony is now testing PSN if it really works if you want to know make go to us.playstation.com go on blog and you will learn more
PSN should be up this week as it says on PlayStation.com
The PSN had a security breach in 2011. The downtime started on April 20th, and ended as PSN access was restored on a region by region basis starting from May 15th.
They indicated that service will be regionally restored starting the 1st week of May 2011 see related question
No, a Japanese PSN account can only be funded with a Japanese PSN card, one with a yen amount on it.
It's actually known as a PSN ID. http://www.us.playstation.com/PSN/mediago
The PSP-3000 can access the PSN, yes.
WHAT DOES PSN STAND FOR OR MEAN
by PSN you need a account to PSN
You can't. PSN stands for PlayStation Network. You can't connect a DS to PSN.
No you can't, PSN cards are country and currency locked. You cannot redeem German PSN topup cards on a UK PSN account.
Yes, there is a PSN link on the Vita's LiveArea.
The password is whatever you set it as when you registered your PSN account.