Images for several Xubuntu flavours are available.

1. Xubuntu 6.06.1 codename Dapper Drake
   Size (compressed/uncompressed): 340.9 MBytes / 1.57 GBytes
   Link: http://downloads.sourceforge.net/virtualboximage/xubuntu-6.06.1-x86.7z
   Active user account(s) (username/password): ubuntu/reverse
   Notes: from standard ISO image, Guest Additions not installed (HOWTO)
2. Xubuntu 7.10 codename Gutsy Gibbon
   Size (compressed/uncompressed): 512.4 MBytes / 2.7 GBytes
   Link: http://downloads.sourceforge.net/virtualboximage/Xubuntu-7.10-x86.7z
   Active user account(s) (username/password): ubuntu/reverse
   Notes: from standard ISO image, Guest Additions not installed (HOWTO)
3. Xubuntu 8.04 codename Hardy Heron
   Size (compressed/uncompressed): 382.4 MBytes / 1.93 GBytes
   Link: http://downloads.sourceforge.net/virtualboximage/Xubuntu-8.04-x86.7z
   Active user account(s) (username/password): xubuntu/xubuntu
   Notes: from standard ISO image, Guest Additions not installed (HOWTO)
4. Xubuntu 8.10 codename Intrepid Ibex
   Size (compressed/uncompressed): 441.6 MBytes / 2.35 GBytes
   Link: http://downloads.sourceforge.net/virtualboximage/xubuntu-8.10-x86.7z
   Active user account(s) (username/password): xubuntu/reverse
   Notes: from standard ISO image, Guest Additions not installed (HOWTO)
5. Xubuntu 9.04 codename Jaunty Jackalope
   Size (compressed/uncompressed): 448.1 MBytes / 2.10 GBytes
   Link: http://downloads.sourceforge.net/virtualboximage/xubuntu-9.04-x86.7z
   Active user account(s) (username/password): xubuntu/reverse
   Notes: from standard ISO image, Guest Additions not installed (HOWTO)