If you don't already know, there is a pretty active forum at
http://www.churchmedia.net addressing tons of issues regarding utilising multi-media for church. There are good technical discussions on hardward, setting up projectors, lighting, special effects, graphics, audio, video production, drama and music, ideas, etc, etc... heaps and heaps of stuff. There's even an area where you can get free royalty-free images to use as backgrounds with ZionWorx!