Not to put my own mod in here...but I thought it would fit somewhere in your list. Its Native American music, and fits really well with Fallout 3. Its not a radio station or anything, since my modding skills svck lol...but still, it adds to the atmosphere of Fallout
Since music/sound (at least for me) is more important than graphics themselves.
http://www.fallout3nexus.com/downloads/file.php?id=6321
and here are some other sound mods, since I don't want to just say about mine
Rune Immersion Sound Modifications (an awesome mod that really improves a lot of the sound)
http://www.fallout3nexus.com/downloads/file.php?id=4246
Wasteland Ambiance (another mod that adds, well...ambiance to the game world. Shouting in the distance, gun sounds and a bunch of other stuff)
http://www.fallout3nexus.com/downloads/file.php?id=4021
And thats it for my suggestions for now.