A recent report by Bloomberg.com shared that Shigenori Yoshida, a Tokyo-based spokesman, said Sony's plan to restart the services full by May 31 is unchanged.
Sony initially thought they would be able to have the PlayStation Network back online shortly after the network was attacked, but has yet to bring the service back online since taking it down April 19th.
In the most recent update from May 6th, Sr. Director of Corporate Communications & Social Media, Patrick Seybold, had this to say:
When we held the press conference in Japan last week, based on what we knew, we expected to have the services online within a week. We were unaware of the extent of the attack on Sony Online Entertainment servers, and we are taking this opportunity to conduct further testing of the incredibly complex system. We know many of you are wanting to play games online, chat with your friends and enjoy all of the services PlayStation Network and Qriocity services have to offer, and trust me when I say we’re doing everything we can to make it happen. We will update you with more information as soon as we have it. We apologize for the delay and inconvenience of this network outage.
We reported last week that our ongoing
PSN Outage Poll - Switching To Xbox? showed that almost 40% of PS3 owners had switched to Xbox 360, or were thinking about it. The numbers have changed slightly since our initial report on the internal poll. If you haven't done so already, you can participate below.