There had been an article in the paper about this new way of laying cement. I didn't understand the whole article, but it was something about using less concrete, and not needing to be as careful setting it, because a lot of the space was filled up by these plastic balls. Something along the same concepts as I-Beams, only using plastic balls for the cutout sections. Or something like that :)
This construction site is also just interesting. It's just up the street from work, and they've been working there for ages.
Had to get a few pictures of the new house eventually too :)