Pull out your copy of the Hitchhiker's Guide to the Galaxy and stare straight at it: DON'T PANIC, folks! Yes, PlayStation Network is undergoing maintenance, but only temporarily, Sony says. According to the company's Twitter account, the PlayStation Network will be under construction from 9AM to 11AM PST today (that's 12PM to 3PM for those of us on the East Coast).
The maintenance may not affect all users' ability to connect, as Sony says that only "some users" may be affected by the downtime. Look at things on the bright side, though -- now you have a couple hours cleared to play that Uncharted 3
single-player campaign you've been neglecting. Drake would be so, so disappointed