if you want to watch WMP format streams/files you'll need the w32codecs package.
add this line to your /etc/apt/sources.list file
Code:
deb http://packages.freecontrib.org/ubuntu/plf/ dapper non-free
then run
Code:
sudo apt-get update
sudo apt-get install w32codecs mplayer
you can use mplayer to open (pretty much) any stream or file.