Blizzard announced Diablo 3 today, at their "Worldwide Invitational". The official Diablo 3 website has also gone live, and has all the relevant information about the game, as well as a 19 minute long gameplay video!

It seems good old Deckard Cain is still around, yabbering away as always. Did I mention the terrain (walls/pillars/etc) are destructable? While the interface looks very similar to Diablo 2's, it's been changed to make it easier to switch between skills and abilities. So far this game looks incredible.