We have gotten some reports of listeners having issues downloading the shows via iTunes or the site specifically. It appears that it was tracked down to an issue with OpenDNS blocking the download.
To be clear, OpenDNS is not blocking cfhour.com. It is blocking audio file download from blip.tv. Also, OpenDNS as an entity is not blocking it. Independent administrators have decided to block it for their users.
If you are experiencing this issue please contact your network administrator and ask them to remove the block on blip.tv.