Our very own Wordaen is currently at BlizzCon absorbing all the information the event has to offer. For his first panel, Wordaen attended a discussion regarding Blizzard's intentions for each class in World of Warcraft.
Check out our BlizzCon wiki to read Wordaen's article on the class discussion. He covers everything from a complete overhaul of the hunter pet system to the changes in all three talent trees for warriors. Of course, Wordaen outlines the death knight class in depth, as well.
Classes weren't the only topic of conversation at the panel. Blizzard also discussed major changes in buffs/debuffs in groups and raids. While they didn't talk much about dual specs, they did have this to say:
Dual Specs are going to be designed more for flexibility and "on the fly" swapping (such as in a raid setting) but they are not going to be something as viable for a hardcore raider as they will for a more casual playstyle.