This is a reminder to all of you hardcore PlayStation players out there who might have let this one slip – The PlayStation Network is undergoing maintenance today. That means that you might not be able to sign in to the service on a PlayStation 3, Vita or PSP. It goes without saying that online play and the PlayStation Store could also be affected at the moment.

Over on the PlayStation Blog Sony points out that you should be able to play online and sign into your PSN account as long as you have signed in within the last five days:

“During this maintenance period, you may receive a message that states “PlayStation Network is undergoing maintenance” when attempting to access the PlayStation Store or PlayStation Home. Online play will not be affected and you will be able to enjoy apps such as Netflix and Amazon Instant Video during this maintenance as well,”

While writing this article we attempted to sign into two different PlayStation Network accounts on both a 40 gig PS3 and PlayStation Vita. We could not sign in on either platform and our attempts to play Uncharted 3 were unsuccessful.

The regularly scheduled maintenance started at 10am this morning Eastern and will continue until 2AM tomorrow morning.