I know the Maronites have started implementing the practice, and in my last visit to Syria, I witnessed the same in a Syrian Catholic church. I thought and still think this to be nothing more than an imitation of Western currents.
However, I've read from message boards (and I believe from a Maronite poster at one time) claims to the effect of what I had said. Some claimed to have read this, though I didn't inquire where they learned of this information. The Maronite in question alleged that ad orientam was a latinisation. No sale. But claims that the practice exists in Orthodox Churches of Syriac tradition had me scratching my head. Someone mentioned he hasn't in his experience seen one Oriental Orthodox or Catholic parish of Syrian tradition that did not adopt the orientation facing the people.
I know that there is now a serious disputes in the Malabar (Catholic) Church over the correct posture.
In IC XC