Earlier it was noticed that Apple had updated the Apple TV with an Apple Events section, with an entry for this evenings event, where the iPad Mini launch is expected, enabling you to watch it live. Naturally the next question was would it be available generally online for viewing. Apple has now confirmed it will with an updated page on their website confirming the event will be live streamed for anyone to view.
Live streaming video requires Safari 4 or later on Mac OS X v10.6 or later; Safari on iOS 4.2 or later. Assuming it stays up of course!