Here is another view of the back.  Most of what I have done here can't really be seen from this view.  It mostly involved getting the front and back half of the shell to fit together.

 

I'm almost done with this, but I ran into a few problems.  My computer is too slow to handle sculpt mode at even two or three levels of multires so I can't finish the shoulder piece or the hands the way I want.  Also, his gun is black so I can't see it in the reference pictures good enough to model it.  But I'm pretty much finished with this and I'm working on some other projects.  Hope you like this view.

 

Thanks for all the views.

He looks great in this last shot.

(Old slow computer - tell me about it, I am still trying to optimise ,my little laptop).

Ok... but what happens when he flushes?

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Am I the only one who thinks they named it Windows because it is a major pane? BA-DUM BOOM!!

I just realized I've done nothing at all on materials!  I have the Blender default material on it with just the colors changed.  I've been experimenting with a weathered metal material but I am not satisfied with the result.  If anyone has any ideas for a weathered metal material let me know.  I'm looking for a shiny, but battle-damaged look.  I've made some changes and I found a better reference picture of one of the weapons and should be ready to update soon.

I would prefere a color scheme with plastic and latex, just as a toy. Anyway if you release it, there will be people that will make some custom colors for you

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Need to come up with a map concept for his face so it won't look like Dork and make it more robot like. The Borg!

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Two wrongs don't make a right.
But six left turns will get you around the block
and back in the driveway again.

I might try a plastic material from the Poser library to see how it looks.  @tda42, he doesn't look like Dork anymore, but I don't want to give too much away.  You'll just have to wait and see.

I finished the weapons thanks to excellent reference pictures found on unicron.us.  I am done with the pre-tweaking stage.  Now I'll have to spend time going through Blender tutorials to get better at modelling and then maybe I'll come back and finish this off.  I replaced P4 man with Mr. wrinkly forehead James.  I just love the fearsome facial expression on him!  Hope you like this one.

 

Scary dude...