The folks who volunteered to test the Ogg Vorbis feed and audio have been immensely helpful. The RSS seems to be working without a hitch across a wide variety of aggregators and the issues we are seeing in the audio files are not with the audio itself but quirks of the metadata.
I had a chat with another listener on the question of how best to publish the new feed along the two existing ones. He recommended something similar to how Mozilla recommends a Firefox download link based on the OS in your user agent string coming in. I will try to implement this idea this weekend and he has agreed to try to come up with a new, distinctive graphic to go along with that new link.
To be more specific, if you visit the site from Linux, the server will detect that and offer you the Ogg Vorbis feed first. For OS X, it will present the Phobos link for automatically subscribing in iTunes. For everyone else, it will present the MP3 link. There will be an additional link, go look at Mozilla’s download page and see how they let you click through to an exhaustive list of Firefox for other operating systems. I will do the same, so that automatic link will just be a suggestion that should be fine for the majority of users. Power users can click through and get at a full listing of the feeds with some nice explanatory text about each.
What I really want to avoid is someone not subscribing because they are confused about which feed is best. The suggested feed based on OS seems like a safe bet and for folks who know what they are looking for, it just introduces an additional click to get at it.
Let me know what you think, especially in the next day or so before I get a chance to actually sit down and code it up.
By the way, for those who cannot wait, if you want to start using the Ogg Vorbis feed, now, I don’t see any problems with you doing so. The URL is http://feeds.feedburner.com/cmdln_free and has been pretty thoroughly tested.