Ed Stetzer recently published a series of excellent posts on the subject of expository forms the sermon and how it compares with other approaches to the preaching task. His approach supports the values of exposition, while treating other forms fairly and helpfully. In the first article he argues for Exposition as a form. In the second piece, he argues why Exposition cannot be held as the exclusively biblical form of the sermon. In the third post, he describes other firms of the sermon and how they can be used appreciatively.
In previous discussions of the subject, I have distinguished between “capital E exposition” and “small case e exposition.” My point is that all preaching out to be expository in the sense that it exposes the Word of God from the pages of the biblical Scriptures. However, the formal elements that have attached themselves to exposition might not be required to the greater expositional interest. One can, for example, be expository without working consecutively through books of the Bible, which has often been a hallmark of Exposition with a capital E.
The goal, of course, is for the Word to be heard. This drives us to the biblical text. That we treat the text faithfully is more important than the form the sermon eventually takes.