The rest of the joists haven't been screwed in yet, but here is a photo of them after they were placed. The last one is waiting for the rest to be screwed in before being placed.
I exhausted myself yesterday raking under the house site to remove the rocks - big and small - so that in future when we are crawling around under there (because it will inevitably happen) it will be less uncomfortable. It is pesky work, and after 6 hours in the hot sun I only have one third of it done. Luckily there is added motivation - the smaller rocks along with the lumps of clay (of which there are plenty) are collected into a bucket and poured onto the driveway at the most troublesome spots.