Dual spec is max-level only. They may expand it to lower level characters if it proves popular.
Learning the "dual-spec" ability requires a one-time fee, paid to your trainer. No word yet on how much it might be.
You can switch your spec at any Lexicon of Power. These exist in every major city, and players with the Inscription profession will be able to create an item that summons one.
The item will be purchaseable by other players.
Anyone can use the Lexicon it creates, but summoning one requires a multi-player ritual. Basically, solo players can switch specs by going back to town. Groups or raids can switch specs during a run by using this item.
No decision has been made yet on whether or not the item is re-usable.
Respeccing will reset your current talent profile, it won't reset your alternate spec. To reset them both you'll have to pay twice.
Blizzard is implementing a "Gear Manager", which seems to duplicate the simpler functions of addons like Outfitter. It won't automatically switch your gear, but they seem to imply that it will let you put on pre-determined sets of gear with one click. More info coming.
The respec cost for hunter pets is being removed.
Hunters are getting a new core ability that lets you remotely access your stable, allowing you to switch out of Beast Mastery (and stable/replace your Exotic pet) without having to head back to town. The ability will have a long cooldown.
You will now have two sets of Glyphs, one for each of your two talent specs.
You will be able to swap hotbar configurations at the same time you swap specs.
You will now be able to click around with your talents in game without saving them permanently. Goodbye talent calculator...we hardly knew ye.
