User error. Full stop. :roll:
It's a good point though; everyone who uses the devpak module has to first press a little drop-down arrow in the Update Server box, and then select "devpaks.org Community Devpaks". There is also an issue that requires the "Use Cache" checkbox to be checked.
It would probably make a lot more sense to re-order the drop-down list so that devpaks.org is the default on top choice. It is the only one that works.