How to access Guest (Linux) Filesystem from Host (Windows) in VirtualBox

How to access Guest (Linux) Filesystem from Host (Windows) in VirtualBox

I am trying to synchronize my music between my desktop (Ubuntu 9.10) and my laptop (VirtualBox: Windows 7 host & Ubuntu 9.10 guest) I use Unison to perform the actual sync, which itself is not the problem. I am ultimately trying to get my Windows 7 host to be able to access the music files so I can sync my iPod Touch.