I placed the little group of bugs with their tomato in a jar to watch and see. If they continue their maturing I'll add more pics.

I think you got it. I found this web page that shows all the instars and it looks like mine is #2.

http://entnemdept.ufl.edu/creatures/veg/bean/southern_green_stink_bug.htm

I recently found an adult that laid eggs on my flowers. I chronicled the molts. You can see a composite image of them all if you want.
http://farm7.static.flickr.com/6205/6084130290_bc1f9c5bcf_b.jpg

I saw the same site you did with the stages. The days they have marked as the time to each molt is pretty close to how mine changed. Have fun watching them grow up.

I'll try and live up to your example. I''m keeping them in a plastic pesto tub with some of the tomatoes they seem to like. I guess they must be pretty common in so cal since youre just down the road from me in "Pedro"