Dialup, I'd go with the Low feed. DSL and above, I'd try the high feed first.
You can also use RealPlayer 7 and above, as well as (as far as I know) Windows Media Player 9, iTunes, like that. As far as WMP goes, I haven't tried it with any of the earlier releases.
The absolute best way to listen in, at least for me, is to find whatever command your player uses for Add URL or Open URL, something like that.
With Winamp, it's Ctrl-L and you cut/paste one of the two addies in, hit open to exit the URL window, and hit play. You should be good to go from there.
If you want to make requests, go to
http://www.radionosferatu.com/playing.html and off on the left hand side of the screen is a link to PlayList & Requests. Go there, look for the song you want, click on the Request link and hey presto.
Anyway, let's do this thing.
low
http://callahans.seanmcpherson.com:10000/listen.pls high
http://callahans.seanmcpherson.com:11000/listen.pls