Ready for music?
Listen to the icecast stream over ssh (client-side instructions)
On the wireless laptop, install the pre-built mplayer package:
 $ sudo pkg_add -i mplayer
 Ambiguous: choose package for mplayer
    0: <None>
    1: mplayer-1.0rc2p6
    2: mplayer-1.0rc2p6-esd
    3: mplayer-1.0rc2p6-no_x11
    4: mplayer-1.0rc2p6-sdl
 Your choice: 1
 ...

Make an ssh connection to the mpd/icecast server:
 $ ssh -L 8000:localhost:8000 mike@musicserver

In another (local) xterm, run:
 $ mplayer http://localhost:8000/mpd.ogg