The major problem is that there doesn't seem to be one definable culprit behind this noise.
People have gotten sway bar endlinks replaced, springs replaced, struts replaced, strut mounts replaced, and even motor mounts replaced. All of these solutions seem to have cured the issue for different people.
It would be one thing if it were able to be tracked down to one single defective part, but it doesn't seem to be that easy. That issue is compounded by the fact that some people have dealt with dealers who will acknowledge the problem AND fix it, and others can't even get the dealer to say that it's anything but normal, let alone look at it.