The new Virsh Command Reference, for documenting the commands in virsh, has recently been started. Only covering the Virtual Networking commands initially, it will expand to cover all virsh commands over time.
If you would like to assist, content contributions are gladly accepted. Please email Justin Clift directly, or get in contact through any of the official libvirt mailing lists.
The latest version can be viewed directly online:
The latest version of the Virsh Command Reference can be downloaded:
The DocBook source is maintained in a git repository available on libvirt.org:
git clone git://libvirt.org/libvirt-virshcmdref.git
It can also be browsed online:
http://libvirt.org/git/?p=libvirt-virshcmdref.git