I've tried this out and like it. If I used my phone for anything but calls, this would be more appealing, imho. Songbird is a cross-platform media player and organizer designed to work on both home machines and mobile devices. http://getsongbird.com/
Windows requirements:
Windows XP SP2, Windows Vista
1.5 GHz Pentium 4 or comparable
At least 512 MB of physical RAM
At least 150 MB of available space on your hard drive
16 bit sound card (Recommended: 32 bit Sound Card)
Speakers or headphones