Aah, Diablo. Played the shit out of both games, I'd say they were a major part of my childhood. Good to hear the beta seems solid. I don't know how much you can say about the game having only played the beta, but do you reckon Diablo 3 is so good it will be a modern upgrade of a classic series (like Half-Life 2), or is it a step down and will be shit on by nostalic nerds like myself?
The art style is a little more WoWish than I'd like (but not overly so, still gives a Diablo vibe), but as far as the gameplay/story structure/re-playability and general "Diablo feel" it is done quite well and after an hour each with the Barb/WD/Monk, I will say the game is more than capable of being a worthy successor to D2 (which I played for years).