A <podcast:adaptive> tag to reference a SMIL file seems easy enough. That would tie things back to RSS in a concrete way.
@dave @cubicgarden This is where alternateEnclosure works, surely? An MP3 file for apps that don't understand it, and then a zip file with the SMIL file and audio files for those that do?
@jamescridland @dave @cubicgarden It would be great to see BBC publish their feeds with Alt-enclosures. I'm sure there's a form for that request.
Intended for all stake holders of podcasting who are interested in improving the eco system