Plantinga: Is Belief in God Properly Basic? I haven't read everything in this thread, so if duplicate some of what's already been mentioned forgive the laziness.
Plantinga's properly basic beliefs are in some ways similar to how I interpret Wittgenstein's bedrock beliefs. I believe, and have argued this extensively in other places, that Wittgenstein's bedrock beliefs are outside the language-game of epistemology, i.e., they are not based on epistemological justifications. One way to understand this, is to consider doubting these kinds of statements. The classic example is Moore's statement, "I know this is my hand." To see how unclear this statement is (according to Wittgenstein) consider its negation, "I don't know this is my hand (but consider this is Moore's context, before a crowd holding up his hand). For the belief to be bedrock in the Wittgensteinian sense, it must generally (i.e., in most contexts) be the kind of belief that is exempt (again, in most contexts) from doubt. If it is generally not doubted, then it is a statement that is outside of our epistemological language-games in those undoubtable contexts.
If a proposition/statement can be sensibly doubted, then it makes sense that it would need to have a justification to support it, or it would need an epistemological justification to overcome the doubt. Knowing and doubting go hand-in-hand, which is why we need good reasons/evidence, or some other kind of justification. Otherwise, we could infer that one knows, simply by one's claim that one knows. Knowing requires an objective justification.
Plantinga's basic beliefs are similar, in that Plantinga believes that his properly basic beliefs, in this case, belief in God, is direct, immediate, and basic. So, in Plantinga's reformed epistemology, belief in God is so basic that support in terms of an epistemological justification is not needed. Belief in God is foundational or basic as Plantinga says. However, I would argue that Plantinga is wrong about this. Why? We can use the Wittgensteinian test, i.e., does it make sense to doubt that God exists? The obvious answer is, yes. The statement that God exists is not the same as "My hand exists." We don't have direct experiences with God, at least not in the sense that we do with our hands, or even our mothers, fathers, siblings, friends, etc. This would be true even if some people did have direct experiences with God. Why? Because most of us don't have direct experiences with God. Belief in God is not the same as a belief that one has a mother or father. Believing that one has a mother or father is properly basic. If you don't believe it, try doubting it.
My conclusion, is that if you have a belief in God, then it requires a good epistemological justification. It's a cop out to think that such a belief doesn't require such a justification.