New info released for Delve at: http://www.playonline.com/ff11us/adoulin/

Delve is all-new battle content that pits groups of adventurers against monsters living in spatial distortions known as "fractures." Throw yourself into harrowing combat with the demons of the depths and acquire powerful equipment the likes of which have never been seen before!
Ready both sword and spell—the battle is about to heat up!
Only the valiant pioneers who have bested the Naakuals in wildskeeper reives and tackled the lurid fiends during skirmishes can participate in the toughest challenges Vana'dielians have ever faced. Fight to the death against forces unknown and prove your worth!
* Up to eighteen stalwart souls may take the plunge into Delve together.



Combat notorious monsters (NMs) in the field and delve head first into fractures for dramatic battles!
Vicious monsters of every shape and size have taken root in various fractures, led by five NMs of particular ferocity. Atop this dastardly chain of command sits a villain of incomparable power. Your goal is to vanquish these five NMs and their leader. In the field, you can use special items known as yggrete shards to call forth the lesser NMs from a fracture and try your might against their terrible forms.
Battles in the fractures consist of vanquishing the five NMs to earn the privilege of taking aim at the most fearsome beast residing within.
NMs defeated in the field will not make a second appearance within the fracture, and up to three may be defeated in advance.
Whether you choose to divide and conquer or barge in and face the evils all at once is your decision. Choose wisely based on your strength, confidence, and cunning.

To the Victor Go the Spoils
Some items and equipment available in Delve are dropped directly from vanquished foes. Others are earned by obtaining mweya plasm, a strange substance acquired from participating in combat, and exchanging it with an interested individual.
What's more, some equipment thus obtained can be upgraded using particular items gained while within the fractures. The more you participate, the better your rewards become!
Mikinaak Equipment
Manibozho Equipment
Bokwus Equipment
Enhancing Delve Equipment
Certain equipment may be enhanced with a special item gained in Delve, allowing for incremental upgrades to your most trusted armaments. There are a total of three upgrade paths to select, enabling you to customize your gear as you see fit.

Not as pretty as a Kali thread but it'll do