Thanks for taking the time to research this, and providing the first real proof of 2.0b2 causing bricks! There's no way they can deny it now, unless they accuse you of being part of the Chinese mafia
Not the first brick that was reported here or elsewhere, but I'll just leave it at that.
Regardless of the bricks that did happen, it's still beta firmware. Most companies just say that there will be problems with beta (read: unstable) firmware.