XP > 60 outside of Outlands?

We aren't currently planning on changing the way experience is obtained in the expansion. If you wanted you could gain some experience up to level 70 in Azeroth, although I'm not sure if getting anywhere past the mid-60s would even be feasible.

You will only be able to level to 70 if you own the expansion.

Q u o t e:
Things that will require the expansion (from what I've read, I could be mistaken about some):
- Leveling past 60
- Utilizing talents past 31
- Entering Outlands or some of the new instances in Azeroth designed for post level 60.
- I have heard that you will be unable to enter the Draenei/Blood Elf starting areas without the expansion. No clue how this will work unless they are instanced somehow.
- Playing Draenei and Blood Elf races (and therefore, playing Horde Paladins or Alliance Shaman).
- Training the Jewelcrafting profession.

Things that will not require the expansion:
- Equiping socketed equipment, crafting socketed equipment, equiping jewels.
- Equiping BoE items that are within your level range that may only drop in Expansion-only areas.
- New honor system.
- Arena system.
- Any gameplay or balance changes that affect the game mechanics as a whole (i.e. UI enhancements or changes that affect the original talent trees)

Things I'm not sure of:
- New battlegrounds.
- New spells that would have early ranks trainable before 61.

We are planning to allow all players to access the new talents, although those who do not own the expansion will of course not have the additional points gained from leveling to 70.

There are no plans to restrict items based on where they are obtained, meaning that socketed or Outland-obtained items can be equipped by anyone if purchased or given. While the Jewelcrafting profession will only be available to expansion owners, the items they create will not be.

The current Arenas being planned are all placed in Outland, and since they are also planned to require level 70 for the ranked matches, the expansion will obviously be required to participate. There is always the possibility that we will expand the Arena system to Azeroth in the future.