I received an e-mail from Archbishop Haverland (ACC) in response to my post a month or so ago, and he clarified that in the Trinitarian article that I was referring to he never actually said REC orders are not valid, just that they should not be recognized. He said that he was merely holding what was decided by a Lambeth conference with regard to the question of REC orders. So, sorry, archbishop, for misrepresenting you (I told him I'd glady post a retraction). The archbishop obviously holds a view similar to the orthodox who neither confirm nor deny the validity of other churches sacraments; rather, they refuse to recognize them, as it would give credibility to heretics and schismatics (Cyprian of Carthage).
The trouble with all of this, and maybe with the field of theology in general, is that it seems like it can never progress beyond these differences. All of this business about, "Well, I follow Cyprian, and you follow Augustine" becomes simply a diversion and an excuse to not make any progress towards unity or resolving the fundamental problem. I am not complaining about the archbishop, mind you. This is a larger problem that we all face, whether it is deciding how Christ is present in the eucharist, or what to do about the Filoque clause, and so on. We go on and on for centuries talking about these things, and discussing and reviving the same questions, and having the same arguments, rarely making any progress. It is disheartening.
To be sure, there are real theological questions - many of great importance - attached to these things I have mentioned. The answer is not to become "atheological". But there is a difference between holding to a view out of sincere conviction, while at the same time really looking into all of the arguments for and against it, and wrestling with the question with an eye to an eventual solution vs. towing some tired old party line. The goal, I think, is a solution to these problems that divide us. And lots of people talk about how we must do that, and how important it is, but very few actually take the steps to make it happen (even if they are just small steps). There have been a few examples of this here and there, such as when the Catholics and the Lutherans signed their joint declaration on justification a few years back. Now we just need a lot more of that. ARCIC was a step in the right direction too.