Podcast bandwidth
Alleviating the podcast bandwidth crunch can be done using an existing peer to peer mechanism that's proven its ability to massively distribute data for the last 20 or so years.. Usenet.
It'd be easy to do too:
- Add NNTP to a podcast publishing tool.
- Use the Message-ID of the message in the RSS enclosure.
- Add NNTP to a podcast downloading tool.
And that's it; no more bandwidth worries!
If you don't think Usenet can handle the load, take a look at the stuff that's flowing around Usenet now. Podcasts would be a drop in the bucket.