For the Orthodox:
-There is no original sin; people simply have to live in this world as a result of Adam & Eve's choices
-Mary was simply a person like any of us who was chosen to be the mother of Jesus
-She is venerated because she was a regular human like us but was Jesus' mother
Does that about cover it?
No, there is original sin, but not original guilt. A different understanding of something, not a negation of it.
Mary was not "simply a person like any of us," but was the child of righteous parents, born of a promise, raised in the temple, keeping a pure and holy life until her dormition. She is venerated because she gave birth to the God-man, and through her God worked the wonder of His incarnation and virginal birth.