By posting this video, are we contributing to a world where game companies can hold press events just to show off an unfinished work in progress? No doubt, but here you go: Diablo 3 beta gameplay video. It's missing Player vs. Player gameplay, but Blizzard promises we'll get that by the time they ship. Which is at some undetermined date in the future.
Also, there are some complaints out there that Diablo 3 will require a constant Internet connection. Blizzard can't really figure out why anyone who can afford console gaming wouldn't have a broadband hookup at this point. For a slicker presentation of what's in store, see the crusty old cinematic game trailer embedded below: