Today wasn't a huge day time wise, I only had about two hours this afternoon to work.  It was pretty productive though, I managed to get the arm assembly attached to the Matchbox claw and get it working.  Here's a pic of the arm attached and strapped onto my real arm:

Tomorrow I'm going to try and figure out how to make 1/2" PVC look like anything but what it really is.  It should be a neat trick, since I've got no clue what I want to do yet.  I'll try to take some pictures of the trigger assembly for the claw extension and the way that I connected it to the PVC.

The upper body is starting to come together in the same way I felt the legs were, so I'm getting more and more excited.  Stay tuned.