The Ten Commandments as God's Moral Law

Many Christian commenters today are expressing concern about antinomian tendencies in the church.  We are especially seeing attempts to downplay the role of God's law as a guide to Christian living (the so-called third use of the law).  One question that comes into play is whether or not the Ten Commandments should be thought of as a uniquely and eternally binding statement of God's moral law.  Or, in contrast, are the Ten Commandments just part of the diverse "Mosaic corpus" intended only to govern the lives of a particular ancient Near Eastern people and thus "more or less inapplicable outside that world" (so David Dorsey).