Using Dropbox to host files
Hi there,
I finally figured the problem out, and am saving this here so others can learn from my mistake.
Dropbox can be used as a simple hosting service to serve up files, as long as you do not host anything too popular that takes up too much bandwidth. (MacLife magazine gave this tip a while back to host iWeb sites.) Simply add a file into dropbox, right-click on it in the Finder and with the Dropbox menu get the sharing link. It will give you a URL to the file that others can download from.
I tried pasting that into my podcast feed, but the files did not show up. It turned out that the dropbox link brings you to a dropbox page where you can click the Download button or sign up for dropbox yourself. If you copy that download link, (usually starts with https://dl.dropbox.com) it should work. The only downside to this is that iTunes will not display the length of time for the file, it shows up as "Continuous" under the Time column when downloaded, as if its a stream.
iPhone 4, iOS 5