This time it's not as severe as the last scheduled outage, since you'll still be able to play online... or will you? I challenge you -dear reader- to decipher... THIS:
Fortunately, most online play will be unaffected. Users who are already signed into their account on PlayStation Network before the start of the maintenance should be able to stay signed in to their online session, but will not be able to access any of the services listed above. Users who attempt to sign-in to their PlayStation Network account after the start of the maintenance may be presented with the site maintenance notification page if they haven’t signed in recently. - from the Playstation BlogSo, you'll be able to play online... unless you can't? Am I reading that right? At least you can still collect Trophy's; they'll post to your account once the 'maintenance' is complete. Here's a full list of all the stuff that you definitely won't have access to-
This latest adventure in PSN land will be an all day affair, lasting from 6am through midnight (Pacific time). You've gotta love the fact that Sony never bothers to really tell it's users why they take the PSN offline. Some people pay for this stuff you know!