LaMar Boschman has been a powerful force in teaching on worship since the 70s. Zion (Dan Gardner's church in Michigan) was one of his many stops in the early days of his ministry, and continues to be.
WorshipInstitute.com
Some free music, teaching and article downloads are available, and even more if you become a member of the site's community:
Community of Friends
Check out these links to sites for ministry employment, if you happen to be currently searching:
Worship Leaders Wanted