This a quick update, a public service announcement of sorts; the European PlayStation forum has a message stating that the PlayStation Network will be down for an undisclosed amount of hours on April 21st, beginning 7AM British time/2AM EST for Americans. It's unknown what the downtime entails, and we're also not sure if this is for Europe only, or if it's worldwide.
So if you've got some important matches planned for the night, we suggest holding off on them, otherwise you may find yourself in for a blackout surprise. Stay posted for updates on what this downtime will bring for the PlayStation Network. In the meantime, log in as much casual playtime as you can over the next 6 hours, or so.