What is the new Battle.net?

We are building the new Battle.net to be the premier online gaming destination. The new Battle.net experience is a full-featured online game service designed specifically around Blizzard Entertainment titles, and will include a complete set of around-the-game features including a state-of-the-art matchmaking system, achievement system, social networking features, structured competitive play options, a marketplace, and much more. Our vision is to create an environment where gamers can compete online, develop an online persona, and stay connected to friends and the rest of the community while enjoying our games. In doing this, the new Battle.net will deliver the ultimate social and competitive experience for Blizzard Entertainment gamers everywhere.

An ancient evil lies dormant within Deephome, the domain of earth in the Elemental Plane. Hidden away in a secluded sanctuary, the corrupted Dragon Aspect Deathwing has waited, recovering from the wounds of his last battle against Azeroth and biding his time until he can reforge the world in molten fire. Soon, Deathwing the Destroyer will return to Azeroth, and his eruption from Deephome will sunder the world, leaving a festering wound across the continents. As the Horde and Alliance race to the epicenter of the cataclysm, the kingdoms of Azeroth will witness seismic shifts in power, the kindling of a war of the elements, and the emergence of unlikely heroes who will rise up to protect their scarred and broken world from utter devastation. Blizzard Entertainment's third expansion to World of Warcraft forever alters the face of Azeroth, as the destruction left in Deathwing's wake reshapes the land and reveals secrets long sealed away. Players will be able to re-experience familiar zones across Kalimdor and the Eastern Kingdoms, areas rewrought by the cataclysm and filled with new opportunities for adventure. In an effort to survive the world-shattering cataclysm, two new playable races--worgen and goblins--will join the struggle between Alliance and Horde. As players journey to the new level cap of 85, they'll explore newly revealed zones, acquire new levels of power, and come face to face with Deathwing in a battle to determine the fate of the world. No matter what the outcome, Azeroth will never be the same.

•Goblin: The goblin race, available to the Horde, will be able to choose from all classes except paladin and druid. Goblins also have some very interesting racial abilities, including a rocket belt that allows players to activate one of two rocket abilities every two minutes.
•The Worgen: The Worgen, our new Alliance race -- has both a true form and a human form. The true form is purely cosmetic, and provides no combat bonus. A player may remain in either form when out of combat, but are automatically placed in their true form upon entering combat.
•New Class/Race Combo's: We’ve also opened up additional class/race options for existing playable races. New Horde options include troll druid, undead hunter, orc mage, tauren paladin, tauren priest, and blood elf warrior. New Alliance options include human hunter, dwarf mage, night elf mage, gnome priest, and dwarf shaman.
•Items: In World of Warcraft: Cataclysm, there are plans to streamline the statistics found on items. We want to remove all unnecessary stats, make all existing stats understandable, and make all "core" stats more appealing. Here are some examples of such plans. With a new legendary item, two-handed axe, available.
•Archaeology: Archaeology is the new secondary profession that will be joining the ranks of cooking, fishing, and first aid in World of Warcraft: Cataclysm. Archaeology allows the player to unlock new abilities and rewards by discovering ancient treasures throughout the world.
•Reforging: Reforging affords tailors, blacksmiths, leatherworkers, engineers, and jewelcrafters the opportunity to customize any player's gear, including their own. Specifically, they can reduce a single statistic on applicable items and convert the lost points into another stat not already on the item.

•The Monk is a fast but fragile melee fighter, providing a contrast to the barbarian’s slower but harder-hitting melee presence in the game
•The combo system that encompasses many of the monk skills is what truly sets this class apart. Monk skills that use the combo system can be chained together in different orders to achieve different results.
•Monsters: The points made were that monsters work best in Diablo when kept simple, that their complexity shows best when it comes from combining different monster types in groups, that being able to identify monsters easily is key, and that the game should keep introducing new monsters to the player.
•More Monsters!: The process began with two new enemies seen for the first time in the BlizzCon demo, the snakeman and sandwasp, then moved on to everyone’s Diablo family favorite, the fallen. Three varieties of fallen were shown -- the rank-and-file fodder imp, the resurrection-happy shaman, and the crazy-cousin lunatic.

Why are Werewolves on the alliance? Wouldn't they be more Scourgeish?