You might find my latest blog entry the "Theonomic Way vs. Postmillenialism" of some interest then (www.faithtoreason.wordpress.com). I don't think you'll agree with it much, except that for different completely reasons we come to entirely the same conclusion ;-), but it's still interesting that a non-postmillenarian theonomist and non-theonomic postmillenialist both agree that the two are incompatible.

I might hazard a guess to say that you are seeing theonomy as a doctrine and not as a way of thinking, but take a look at my little article...interested to hear your thoughts.

Barry