(note: Windows users can ignore this)
The source code has been updated to make a workable version on Linux. Things you should know:
- I'm using Ubuntu, it's only been tested on Ubuntu
- covers and biography information are disabled
- there's a 4 second wait between playing songs/stopping a song
- playing sometimes doesn't work, waiting 10 seconds and hitting play again may solve the problem
- other problems, see http://groove-walrus.turnip-town.net/dru/node/82

Okay, Linux requirements:
- Python 2.6
- wxPython 2.8 (called: python-wxgtk in the Ubuntu package manager)
- Pymedia http://pymedia.org/tut/install_src.html

After those are installed, unzip the following and run "python gw.py" from the console.
Download: http://turnip-town.googlecode.com/files/gw_0200_src.zip