"I am confident that this has happened already and may be happening now in high-risk and/or hard-to-reach territories where there is not Latin presence but an Orthodox presence is already established."
I don't doubt this at all. In fact, in the Middle East it likely went on last Sunday...and with Maronite, Melkite and Orthodox Churches all open in the same town (they share catechism classes and teachers too)! 'Course, in some parts of the world, rules are made to be broken. :)
This level of intercommunion, though limited, do pose some interesting theological questions. If the RCC and the OC are allowing a limited number of their faithful to receive the sacraments in each other's Church, up to and including the Eucharist, then, are we really "two churches"? Are we "one" at one level but "two" on another? Isn't that like being "just a little bit pregnant"? IOW, nonsense?
Rome is not asking Orthodox priests to accept papal supremacy for them to minister to Catholics under these circumnstances; Orthodox are not forcing Catholics to convert before they receive the Eucharist from one of their priests.
What are we seeing here?
-Theo