The Blue Tracker has moved to http://diablo.incgamers.com/blizzard-tracker/. This is an archive.
Both normal mode and Hardcore mode are available on the console version of Diablo III.
The clip of Belial you saw in the PS3 teaser video was just a mere snippet of the fight, and there will be other monsters challenging you during that encounter. The Lord of Lies comes prepared!
Players playing on the same screen will share the same loot. Additional players on the sharing the same screen will cause more loot to drop.