Sony has confirmed that the PlayStation Network maintenance, which was scheduled alreaady have finished by now, has been postponed, with no future date offered by representatives.
The maintenance was due to take place between 1900GMT on Tuesday the 31st of May and 0100 on Wednesday the 1st of June. But anyone who logged on during those times will have experienced zero down time.
On the European forums, Sony said: "We currently do not have any further information available as to when the maintenance will be rescheduled, although as soon as I have more information available I will update here."
Source: EU PlayStation