Just finished (largelgy based on an example) a small simple php script to take files from a folder and turn into a podcast feed. Directory to Podcast PHP script.
This may be useful if you want to setup a cron script/server application on a home server to download your latest podcast shows. Using this script you can then reserve the downloaded files as a local podcast feed.
This is useful at home as your server can download at none bandwidth critical times, when your isp applies limits or around 9pm when the internet is going really slow. When your main machine is switched on the podcasts will download very quickly over your local network.