On another blog I've been following a discussion about Two Kingdom theology. It is apparent that many don't get it, don't want to get it, or simply play the "Lutheran" card to end all discussion (i.e. your view of the God's Kingdom is not reformed but Lutheran).
Recently I found this link to several interviews that Darryl Hart gave concerning the topic of God's Kingdom. Enjoy!
Links to DG Hart interview on the 2 Kingdoms