Tonight is the night that Sony will make some sort of announcement about the future of the PlayStation brand. Some speculate that it will be more details on their next system, commonly referred to as the "PS4." Hopefully there will be some other surprises like game announcements, new features for the technology they already have on the market now and - with any luck - a price cut to the North American and European versions of the PS Vita hand-held - which currently cost as much as a brand new PS3.
Whatever they announce, there are several locations to watch it from, but the official place to see it provided by Sony is over at the PlayStation Blog. The event will be broadcast live over the Internet at that location at around 6 PM ET. We'll have a recap of it all later on in the evening, barring any technical difficulties.
Update: you can also watch it on www.twitch.tv/playstation.