I said the same thing to my brother this morning (whom I dragged into this magical mystery tour), "they better not dilute us again unless they have some very serious customers and our shareprice is substantially higher. It's enough already."
I'm sure Apple sends people to company's to oversee their work all the time, signing NDA's with all of them, and 99% of the time no one says anything, so this is common.
Whether Apple uses all of those products is another matter, and of course, they do not.
That being said, belief is one thing and proof is what we seek, everyday here, and we don't do too bad a job (they must have crapped when Guernsey21 came up with that Vietnam piece...nice work!)
But I think your key statement was "when they can legally come out of the closet", or words to that effect....they are still all bound up by countless NDA's with who knows how many entities, so when those encumberances finally fall, if they ever do completely, we may get a look at what the big picture is.