We'll just come out and say it: we're totally underwhelmed by the new plastic MacBook. Hell, we were underwhelmed by the old plastic MacBook back in June, when we reviewed the refreshed unibody MacBook Pros -- we said we were "honestly left wondering" why the $999 plastic model continued to exist when the $1,199 13-inch Pro was obviously superior. So when we heard the first whispers that Apple was working on a total overhaul of its low-end MacBook, we naturally assumed t
