Still laboring away in my ivory tower.
Earlier today, I spent some time cleaning up and making things easier to use. Pretty much, that meant going through the demo program I showed yesterday, and wherever I thought, "I shouldn't have to do that manually, the sprite system should be doing it for me," I made it so.
Tonight I'm working on CollisionHandler. I've got a design that satisfies me, so after publishing this post it's back to Ye Olde Emacs for me.