I just received the beta invitation earlier today.
Downloaded and played up to level 5 Barbarian and I must say I am impressed. Everything works as you expect and lots of fun. As usual Blizzard stuff is high quality, top notch graphics and gameplay/storyline even in this Beta version.
If you guys are interested I will post stuff about it or if you have questions I can try to answer. Even though this is a closed beta, there aren't restrictions about sharing info/screenshots/video.
Diablo III (closed Beta)
Diablo III (closed Beta)
Harper of no small water - Clan Wild - DragonHeart