They're packaged in a jewel-case, as opposed to a regular DVD case, and consequently make good stocking stuffers.
Although the program is available online, watching it on a TV screen does much more justice to the image quality and overall story. Having a DVD is also a convenient way to pass it along to others who might be interested in the issue.
You can purchase one by making a check payable and sending to:
579 Nazareth Road
Kalamazoo, MI 49048
(NOTE: HorsePower Pictures is not a 501(c)3; donations are unfortunately not tax deductible)