Ok.. several answers here
The boy I stitched by hand, the girl was machine done. I think the boy actually turned out better on close examination because the corduroy was a bit stretchy and i had the tension a bit wrong on the machine so it got a little bunchy and stretched out in a few places.
The way I attached the head to the body was that I centered the front of the head and stitched it to the front of the body, and the same with the back, and then put the shoulder pieces in afterwards. For the legs I twisted together three pieces of yarn and then put them through one of those HUGE needles.. not sure what they're called, you know the ones I mean? and then poked it right through the piece of fabric that made up the bottom of the robot. I had to wiggle it around a bit to get it through but it looks really nice! Then I tied a knot inside and voila!
I'm considering selling them on my friend's website, I have some purses up there right now (http://omglikewoah.pure-sugar.net
). I can't figure out how much I'd charge for them though, or how big an interest I'd get in them.