Per your last question, "Is there training available...other just getting in there and doing it". There are a number of resources available to supplement hands-on experience. Here are a few:1. Curt Taipale produces a number of useful live seminar and audio/video resources: www.churchsoundcheck.com
2. Technologies for Worship Ministries (www.tfwm.com) offers the Inspiration series seminars and workshops, as well as a great magazine publication, with web article archive.
3. Church Production magazine (www.churchproduction.com) is another great magazine publication for the church tech.
4. All Pro Sound is a dealer that offers a resources on media, such as "Sound Doctrine" on videocassette and the book/CD combo "Sound Made Simple" (www.allprosound.com)