Set your router to always on for the connection
The problem was that the network was shut down on April 20 2011 and is now back up. You should be able to sign in and will have to change your password
You can sign up to the PlayStation Network by going into "PlayStation Network" on the XMB, then click 'Sign Up to PlayStation Network'. Or you can follow this link to sign up on your computer, then transferring your account to your PlayStation 3 console. http://www.us.playstation.com/PSN/SignUp
The network has been shut down. The related question will provide the latest status
Get an Xbox.
The PlayStation network has been shutdown since April 20 2011. They do not know when they will have it fixed and running again, but are working round the clock rebuilding and strengthening the system. The related question will have the latest information that has been provided and will be updated as new information becomes available.see related question
The network is down more information is available at related question
In order to connect to the Playstation store you must sign in to the Playstation Network and select the icon from the Xmb for the Playstation Store.
PlayStation Network is the main service that PlayStation uses for all of its online services, such as online multiplayer. You are connected to PlayStation Network whenever you sign-in, or play a game online. You can also access the PlayStation Store on PlayStation Network, as well.
Yes it is
you sign up and it's free on a psp
You have to be 18
yes to play on the PlayStation network you need to sign in That allows them to ban people who break the rules
There is an option on the xmb menu, under the playstation network section, that says sign up :)