8bit FM is a nice streaming online radio station that is devoted to chiptune music and classic game soundtracks.
Woo! You used my pixel
Also you might want to listen to slay radio http://www.slayradio.org/home.php
It's remixes of C64 tunes and most can be downloaded from http://remix.kwed.org/
I'd rather do what I do now and just get all the game soundtracks (usually in their native formats whether AY, MOD, SID, NSF) and listen to whichever ones I like on Winamp with the required plugins. Last time I tried listening to a retro game radio station it was often too focused on stuff I hated and also a lot of bland remixes that sucked the life and genius out of some of the classic chiptunes.
It doesn't work for me either.
Sorry guys. It worked when I added this news item maybe it'll be fixed soon.
Nectarine is a similar (but actually working, streaming) radio station.
Based around the demoscene and older systems you won't hear a lot of mario/zelda but more C64 covers and original chiptunes. Currently playing: a song with soundbites of doom and wolfenstein3D.
@ shampoop +
I <3 the dancing girl.
Seems the stream itself is down. Either that or their IP changed and they haven't updated the playlist links yet.
I can't get this to work either.
Tried it on all 4 reccomended programs "service unavailable."
Damn. I'm getting service unavailable from WinAmp :( 
Is there something else we could do to listen?
Damn. I'm getting service unavailable from WinAmp :(