I dont know if it real but I want to share some rumours because it seems very trustful. A few quotes from a prepared German-previews appears in the German community. Seems real because the Source posted a few Screenshots from the Press Kit to proof it.
Beta will start in waves. North America first, Europe later.
"Real Money" Auction House. You can sell and buy Items for Real Money. You have to pay fee to Blizzard for it. You can also use an Ingame-Gold Acution House.
Blizzard will not sell Gold or Items. It is just Player to Player Trading.
Every Class has its own introductionvideo.
The Auction House has an amazing search system it sorts the items by the best stats for your charakter.
Beta contains all five classes and ends with Leoric.
Hardcore Modus is in (No more Infos)
Match-Making-System for Random Groups and PvP-Arena.
Banner-System: You have a Virtual-Banner for your Achievements. It contains all Achievements from your account (not Character).
They will also release a long new gameplay trailer tomorrow. It will contain new skills and runes.
No specific End-Game Content (No Raids etc.), but they want to add more stuff for high level players later.
Naming-System will work like in StarCraft 2. You have a name and an ID like Diablo.113
More Infos about the Demon Hunter:
Demon Hunter has two resources: Hate and Discipline
He uses Hate for Attackspells. Hate regenerates very fast.
Discipline is for defensive abilities and regenerates slowly.
No changes on the resources-system for the other classes.
Screenshot from Battle.net:
Screenshot from Banner: