Hey Gordon. Podcasting is actually a very accessible medium for the blind at this point. Many blind podcasters use www.livejournal.com to do their show notes and create the enclosures along with www.feedburner.com to distribute their feeds. On the listener side, most people are using a program called Juice Receiver to download the podcasts. As far as media players, winamp is the ultimate in accessibility. Real player isn't that bad either, but my personal preference is winamp because it's a very streamlined interface. If someone were to do naratives for video podcasts, just bake the narative into the audio of a video podcast, not as a seperate track, but in the stem mix itself. Hope this provides some helpful information. Have a great day.