This is a must have for anyone operating a wireless network.

Electronic Warfare Associates releases 20-page PDF with sensible advice for securing wireless networks using existing technology: they don't claim this methodology is 100 percent secure; rather, they describe a series of sensible, generally inexpensive steps that ensure the best possible results with the least amount of ongoing maintenance and concerns. The paper is available in PDF form from their security white papers page; you can also use Adobe's free PDF-to-HTML converter, which allows you to enter a PDF's URL and have the page displayed as text.