IRC is great at LibrePlanet for sure. The AV people have been fantastic and very responsive to issues. Big thanks to them for running this!
If you are using the web player and it acts up you can hit up the icecast page directly to see if that works. You can visit either of these pages at least at the time I'm typing this up.
http://live2.fsf.org/ or
http://live.fsf.org/If the stream doesn't work in firefox or whatever browser you are using after a couple of refreshes some people have had success with VLC.
Hope that helps!
-Marcus
PS If you are getting lag you can mess around with the advanced settings in VLC to increase your buffer size. It might help. Good luck!
This has been my experience anyhow. :D