Here are some good more posts related to the Reformation:

Where Did the Reformation Really Begin? – David Mathis (DG)

What Sola Scriptura Really Means – Mark Thompson (Crossway)

Where the Bible Teaches We Are Saved by Christ Alone – Stephen Nichols (Crossway)

The American Priest who Proved the Reformation is Not Over – Jordan Standridge (the Cripplegate)

6 Ways to Celebrate Reformation 500 This Sunday – Jason Helopoulos (TGC)