The Lutheran Church Missouri Synod
Concordia Publishing House: Official Publishing House of the LCMS
Higher Things: Dare to be Lutheran
Issues Etc.: Christian Radio for the Thinking Christian
Pirate Christian Radio: Pietists Beware!
Cranach: a blog by Gene Veith on Christianity, Culture, and Vocation
Other sites of interest
The Brothers of St. John the Steadfast: Defending and Promoting Confessional Lutheranism