Radio stations list on iTunes

I don't think you can add your radio station to everyone's iTunes Radio feeds, but you can certainly add the feed to your own radio feed list. To do this go to Advanced->Open audio stream... and then enter the URL of your radio station's audio stream.

I'm not sure, iTunes probably has the most popular radio feeds. That's just a guess though.

As to adding another radio stream to the iTunes radio feed list, I can't find a direct link on the Apple support site (there's probably one somewhere) so you can click 'Help' at the top and then type in what you're looking for help with.

Requests to be added to iTunes radio tuner can reportedly be sent to the following email address:

itunesradio@apple.com

More information purporting to come from Apple was posted on the following web site a couple of years ago; no idea if it was correct and if so if it's still valid:

http://forums.streamsolutions.co.uk/showthread.php?t=4159&highlight=Itunes

Good luck.

How do stations appear on that list then?

It is not clear at all.

Even after I manually add a radio stream, it doesn't appear in the radio listing I have on my iTunes.

It won't. It should be listed under Library -> Music
I create a playlist just for radio stations I add myself.