Hi,
Another issue that arises from placing the full URI to the media file in filename rather than using server/path/filename options is that the podcast output xml appends an extra http:// to the start of the path. (Actually this was the case in 6.0 also, I just modified my copy)
Fix attached.
/administrator/components/com_biblestudy/controllers/podcastedit.php
Attachment podcastedit-20091003.txt not found