Spirit of Harmony

Since there is lots of speculation, I thought I made a post to sum up the facts.

Spirit of Harmony is the new elemental material and will be the only elemental in Pandaria.

It behaves like previous elemental, it is collected in the form of Motes of Harmony, using 10 motes produce a Spirit of Harmony.

It is Bind on Pickup, hence no more elementals market, if you need it, go out and farm. May become BoA in the future but so far is all speculation, it looks like will never be unbound though.

Motes of Harmony can be found as a random drop or can be obtained once Revered with the Tillers by planting a Songbell Seed, which when ripe rewards a mote.

Spirit of Harmony can be used by Alchemist to purchase extra transmute and Jewelcrafter to purchase extra daily discoveries.

For gatherers who have no need of these for crafting, Spirit of Harmony can be used in the Vale of Eternal Blossom to buy trade goods. Vendors can be found on the terrace of your faction's temple, next to the riding trainer. The Alliance trader is Krystel, while Danky works for the Horde.

The vendors will let you trade in a Spirit of Harmony in exchange for a choice of:
1 Ironpaw Token
1 Restored Artifact
1 Starlight Ink
20 Windwool Cloth
1 stash of 20 random Pandaria Herbs
2 Golden Lotus
20 Spirit Dust
5 Mysterious Essence
1 Ethereal Shard
20 Ghost Iron Ore
20 Kyparite
5 Black Trillium Ore
5 White Trillium Ore
20 Exotic Leather
20 Prismatic Scale
1 Serpent's Eye

While is true that at some point other elemental materials were datamined and we observed Spirits of Autumn, Spring, Summer and Winter, these never made it into the game as Blizzard has decided to scrap the elemental separation and go for a single elemental. This, as explained in a Blizzard's Blog, is the result of design simplification in order to avoid filling player's bags with many materials, and my guess is that they also wanted to avoid the supply diversification that made some elementals so common that were almost without value, like Volatile Earth, compared to others that having less sources had their price pushing up, leading to the Volatile shuffle.

On 9/18/2012 Ghostcrawler said they will probably make Spirits of Harmony Bind on Account "eventually". Source.

This doesn't appear to be well known, so upvotes appreciated.

For a dual-gatherer, it's a choice between cashing it in for something lower-value but immediately useful, vs. saving them for the probable/eventual day the above comes true (when your crafters may not need them anymore).

Crafting Material SHOULD NOT BE soulbound.