Are both species (Body and Blood) Administered?
Are they given seperately or together?
Are they given into the hands of the faithful or placed into the mouth by the priest?
As far as I know, the British Orthodox Church is the only OOC in which the Body of Christ is placed into the hands of the communicant.
Is wine used (some time ago, I asked an Ethiopian here, and he said that Holy Water was given with the eucharist. Is this accurate?)?
Wine is always used. I presume what your friend was referring to is the practice of adding holy water to the wine in the chalice, which is also done in the EO churches.
Some OO churches also give holy water to the faithful after they've communed, in the same way some EO churches will give blessed wine.
As for leaven, the Armenian church uses unleavened bread, whereas the other OO churches use leavened.