As a person with a Lutheran background (somewhat convoluted and sidetracked admittedly, as most people who read this blog know) I found a recent university course on Christian ethics moderately distasteful in its carelessly assumed Calvinism. I prefer progressive Catholic teaching on ethics by far, and am especially impressed by the work of Daniel Maguire (not top of the bishops' hit parade by any stretch!) Maguire's A Moral Creed for All Christiansis worth a truckload of Reformed gnat-straining.
A specifically Lutheran approach to ethics, however, is hard to pin down. It's not the same as our Calvinist brethren, and often woefully negligent in specifics. I found this article by Ed Knudson, an ELCA pastor, fascinating because he actually tackles the ethical question, and in the difficult context of the recent murder of George Tiller, a doctor who performed abortions. Tiller was also a practicing Lutheran. Knudson goes as far as implying that he was a martyr.
I'm not sure how to evaluate Knudson's article. It needs time to "settle," and deserves a second (and third) reading before leaping to conclusions. Reservations? You bet. But definitely food for thought (and grist for fundagelical outrage, no doubt.)
Related Link: Online Journal of Public Theology.