If you were planning an all day Uncharted 2
marathon tomorrow you're going to have to change your plans as Sony announced today
that the service will be down tomorrow for "regular maintenance" The window is 11AM EST to 11:30 PM EST tomorrow so plan on doing other things or playing solo games like God of War III until the service comes back online. You can track the progress of the install via the PlayStation twitter feed
if you're into that kind of thing.