I've been waiting to whip out my new Graphire3...I really want to use it but just haven't really had the reason to, but now I might just screw around to get a bit better after seeing this.
And I really like it. I would make a left shoulder, and make the torso less skinny. Possible make the head better, sort of remids me of my beagle/rottweiler dog with a big body and small head ;) .
Looks very promising though. Did you just use the standard hard round brush?