I know you want an actual date for the answer. Only Sony will be able to say when the system is up and they have only said what is written below or available at the related links messages of May 10 and May 7 and the related question. Any other answer is not from them and is a Guess, Prank, or earlier estimate
The PlayStation network has been shutdown since April 20 2011 after they learned they learned of a network intrusion. Information on the actual Intrusion is limited by security considerations and criminal procedures. Latest Sony post under related link of May 7 said the planned procedure to restore services regionally first week of May 2011 has been delayed while it is being tested and the May 10 message said that they were unable to provide an exact date and would be at least a few more days. There also was several messages about starting a program to provide customer bonuses. The posts at the related link will have the latest and best information that has been provided directly by Sony and is the only source for new information available. A number of Sony's earlier posts can be found in links under the related question
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Supposed to have some services back up I.e. psn on may 3rd but we will see see related link or question
nope should be back tomorrow (may 4th) They said they would start bringing the network up this week and the best information available will come from the related Sony Link
No, PSN cards can be used only once. If are from a different region and you need a PSN card that belongs to a different region since you have a different region account then you can buy the PSN card from online
the time psn will be back on is not known and not predictable, the network needs critical security repairs Sony indicated services are ready to begin coming on by regional area the 1st week of May 2011
The PSN has been up again for over a year and only shuts down to perform maintence The PlayStation network has been shutdown since April 20 2011. They are working round the clock rebuilding and strengthening the system and should have it back up within a week, Early May 2011 they will begin the procedure to restore services regionally. The related question will have the latest information that has been provided and will be updated as new information becomes available.