ethereal items properties

[D-Dave]

"Etheral" improves damage on weapons and defense on other items.
(indestructable items like Amulets, Rings and (as far as I know) indestructable Weapons (includes Bows/Crossbows) will never be etheral, same goes for the Uniques that are indestructable)

The Bonus for being etheral is 50% and raises the BASE DAMAGE / DEFENSE so all other bonuses are calculated based on these raised values.

Shields do not receive an increased blocking for being etheral.

I am not sure if "repair over time" or "replenish over time" work after item reaches zero durability/stack as those items are considered broken by the game...so the question is, if this is flaged permanently by the game...no clue, sorry

Ah, and for the drop probability: "etheral" is not generated like other affixes (as it technicaly is no affix but a changed base item) magic find does not have any influence on how many etheral items you will find.
From what I know there is just a plain Percentage based chance that an Item that can be etheral will be dropped as etheral.

hope this helps

-dave