The Asbury Revivals

The national media is all abuzz with what is happening at Asbury College in Kentucky. So far, 100,000 people have made their pilgrimage to the scene of the revivals. But how does the Bible define revival? What is it to be revived spiritually, and what are the biblical indications of a true Holy Spirit outpouring? Why is preaching and the Word of God more on the back burner with modern revivals—displaced by "worship music," testimony, and prayer groups?