The weekend beta access was just for stress testing. Blizz basicaly gave out thousands of keys then capped the server limit to test how well it would cope etc. I still spent ages trying to get in though, didn't happen.
I'm probably going to download unless Blizzard removes the real money auction house thing. I want to play the game but I refuse to support that type of change to any game, it will do nothing but ruin the gaming scene for all eternity.