I found two articles today that may be useful for churches and other small-budget non-profit organizations:
How To Revive An Old PC With Linux
The article is described as a "short guide to getting your old clunker up and running again with a free Linux download and a reasonably quick installation."
The second article deals with computer security and personal computer firewalls:
How To Secure Desktop PCs With Personal Firewalls
This article may be useful for your church staff persons who travel and use wireless networks away from the secure network that one controls in your church.