EA has announced that their servers will be unavailable today, January 31 at 10:00am (ZA time zone or 12:00 am PST) for three hours as EA has scheduled maintenance.
The games that require you to log in to the EA servers including Battlefield 3 and Need for Speed The Run, will be unavailable for the three hours, while Star Wars: The Old Republic will apparently be offline for slightly longer due to a separate scheduled maintenance.
So users will be unable to log in to the Origin client, online multi-player game lobbies, but the offline mode should remain playable.