Justin Taylor recently posted an entry on the Desiring God blog called, "Trinity 101." Now, I am a seminary student in the school of theology at one of the premier Southern Baptist schools, The Southern Baptist Theological Seminary (yes, the THE is capitalized). Furthermore, I have been teaching through Grudem's very helpful Systematic Theology in my Sunday school class for a couple of years. All that said, you need to read this post.
May we ever dwell on the infinite riches of the Trinity!