The rig has been previously featured in the BlenderArt Magazine in issue #15, which can still be downloaded from this page on the BlenderArt site.
"It was previously featured in Blenderart #15 and it is available there too in
the blends of that issue. (There is an article about my modeling process and
transferring the rig to other characters)
I hope that it might be of interest to the Blender community."