The ICF build-out is going very well. ICF stands for Insulated Concrete Form. Basically the foundation is a poured wall, but instead of being poured in a traditional form, which is setup and then removed (and taken to the next job site) the forms are tough, insulating foam which become part of the wall. In this case about R22 worth of foam with a 10" concrete core which gives significant thermal mass.

ICF is more expensive than a block or poured wall, but not radically more, and the insulation is built in, rather than added on later at additional expense. The light blue ties that hold the walls together also act as places where drywall can be screwed, so studs or furring strips are not needed. The metal braces are removed after the pour. There are turnbuckles on the brace rods so the wall can be shifted/straightened during the pour.