Here is a video demonstrating all of the controls that I have placed on the cat rig so far. I did this largely without the aid of tutorials, apart from a few things such as constraining the eyes to the rig and parenting the rig to a "Master Controller", but I have found that I can do an adequate rig from memory.
I have applied a smooth bind to the Cat rig, but as you can tell, she hasn't been weighted yet, hence that ugly bend in her stomach, whenever I bend the legs in some way. James T has taken on the job of weighting all the characters, so I have passed this rig on to him. I will post up the final cat rig once that has been done.