Use iTunes to convert all non-mp3 podcasts to mp3 in iTunes

convert_podcasts_to_mp3.applescript

tell application "iTunes"
	set podcast_playlist to some playlist whose special kind is Podcasts
	set podcasts_to_convert to file tracks of podcast_playlist
	repeat with podcast_to_convert in podcasts_to_convert
		set podcast_location to location of podcast_to_convert
		if not podcast_location is missing value then
			set podcast_location to "" & podcast_location
			if podcast_location does not contain "mp3" then
				convert podcast_to_convert
				-- display dialog podcast_location
			end if
		end if
	end repeat
end tell