Concrete went into the forms last Monday...
...and they started framing the basement walls late last week.
The foundation has been waterproofed and drainage is in.
At this point, the basement walls are fully framed in (this photo was taken last weekend) and the subfloor for the main level is going on. We went to the pre-fab company's warehouse yesterday and saw actual sections of our house, and they told us that the main floor walls are being lifted into place on Thursday! We're really hoping that we can be there to watch it happen (our contractor thinks we are a serious couple of geeks).