If you tried to sign into PlayStation Network on your PS3 or PSP in the last 30 minutes, you may have had no luck. Do not be alarmed, Sony says that PSN will be down today, but it's not another security issue.

The company posted today on its PlayStation blog that PSN will be undergoing "maintenance" between 8 a.m. PT and 5 p.m. PT. That means many users will have trouble signing into the service on their console or handheld, but can still sign in to play games online, including on Sony Web sites like PlayStation.com.

What will be down for everyone is the ability to change passwords or register for the service. Sony did not expand on what the maintenance hopes to accomplish, but it could be related to a vulnerability discovered last week.

More: http://news.cnet.com/8301-31021_3-20065684-260.html