Here's an article that was pointed out to me by my friend Matt: GNU Believers. The article has links to several Linux apps that could save churches lots of money. There are a couple of free replacements for Song Show Plus (song lyric projection), a free Bible-study program and a member database program (which would replace some very expensive proprietary apps). I also know of a few Linux video editing programs. If these programs would work, then I think a church like ours could make a successful migration to Linux (unless I'm forgetting something).