A live off-air feed of Voice of Free Libya, Benghazi on 675 kHz is now available at http://www.ustream.tv/channel/benghaziradio . They have just broadcast what is, apparently, the new national anthem being used by the National Transitional Council. Broadcasts are, of course, in Arabic, but sometimes there are explanatory comments in English on the chat stream beside the audio player.
Update 1815 UTC: I was waiting for a station ID, as various names have been reported, but heard a clear ID at 1807 UTC as “Sawt al Libya al Hurra”. Station operates 0530-2350 UTC according to the Euro-African Medium Wave Guide. (R Netherlands Media Network Weblog)