In addition, you will not be able to sign in to PlayStation Network from eu.playstation.com. If you wish to play online during the maintenance, please ensure you sign in to PSN before 16:05 on Wednesday 9 March 2011.
During this maintenance, you can continue to collect in-game trophies and these will be updated on your profile once PlayStation Network is back up and running.
Some users may find they receive an error code when attempting to log into PlayStation Network, this is due to the maintenance currently being carried out.
If you have any questions about this down time, just post them here and we'll do our best to answer them.
For the latest maintenance updates, just keep an eye on this thread or follow my Twitter @RabidWalker.