Praise and Worship Metasites

• Huge Collection of Links from the Worship Resource Center. Primarily geared toward evangelical/contemporary styles, but not exclusively. You could surf for days, following their links.

Contemporary Worship Music

• Worship Resource Center: huge song database, along with extensive links and resources for leading "contemporary worship." Doesn't appear to have been updated recently.
• Creator Magazine Online Links: HUGE listing of church music related links
• WorshipLeading.Org: Huge site devoted to the "mechanics" --instruments, equipment, and the art of leading contemporary worship
  

Traditional/Classical/Sacred Music

• Music and Worship Resource Page from the Pennsylvania from the American Choral Directors Association of Pennsylvania homepage
• Hymnology & Chant Study Sites: very helpful links from the Church Music Research Tools Site

Church Musician Metasites

• Today's Church Musician surfs onto the World Wide Web... Copyright Issues; Reference Shelf; Theological Currents and more

Journals Devoted to Church Music

• Creator Online: The BiMonthly Magazine of Balanced Music Ministries: "Our subscribers are a true cross-section of church music and worship leaders. Creator’s subscribers can be found in small churches and large; churches that consider themselves liturgical, evangelical, and blended in their style of worship"
  

Articles on Music and Worship

• Guidelines for introducing a variety of hymns:  Helpful, succinct advice from a Methodist Worship specialist