Also, while surfing around this evening, I ran across another resource, Theology of the Cross. here's how this site describes itself:
Following Luther's observation that "the cross alone is our theology," Theology of the Cross links to sermons, essays, and research articles on confessional Christology. Categories are denominated by the chapter titles of Francis Pieper's Christian Dogmatics to facilitate classification and further reading. Difficulty levels: Youth (still to come, e.g., Higher Things), Adult (e.g., LCMS web site), Seminary (e.g., Concordia Theological Quarterly). Titles appear more or less in chronological order within each level of difficulty.I've placed both of these websites in the "Resources" section in the bar to the right.