After endless wanderings around the area of the announced drill site, it appears that they’re finally doing the deed, according to this sol 170 Navcam image, which shows the drill in position. That “telephone dial” is the opposite end of the drill axis, so the business end is at the surface. This is the first image I’ve seen showing this deployment.

This image taken a few minutes later shows the drill in another position, although it doesn’t seem to have been used yet. Subsequent sol 171 images show the drill being moved around some more, but again, no appearance of actual drilling: