The biggest new feature is voice chat:
Voice Chat - The new Voice Chat feature is now available in game. Players will need to go into the options menu under Sound & Voice to activate it. Volume sliders are available for the microphone, speakers, and game-audio fade (which automatically lowers the game audio when a voice communication is received), as is a “push-to-talk” setting. Right-clicking on a player’s name now includes the option to mute or unmute that player. Muting another player blocks all voice chat from him or her; the ignore feature now blocks both voice chat and text chat from that player.It should definitely be a good week for WoW parody websites, WoW comics, and most definitely for the guys over at Ventrilo Harassment. However, for me it will probably be more than a week before I even have a new mic to use. I was never a huge fan of voice chat, but it definitely has it's advantages and I can't deny that I will probably be using it.
Oh, and a side note, they nerfed Shamans again:
Earthbind Totem: This totem will no longer break Rogue stealth.Because all the Shamans in WoW know how useful totems are for popping rogues. I just don't know what to do as a shaman with half of my crowd control now somewhat nerfed.
