I have nine icons left on my list: Automate Hurry, Bunker [the improvement, not the building], Burn Forest, Burn Jungle, Command Center, Global Positioning System, Industrial Complex, Plant Animal Herd (I still want to go back and look at this one a little), and Small Diameter Bomb.
I also am working on assembling the buttons into atlases. I still have hundreds of buttons left to do, but I think a lot of them don't need any real work. They are leftovers from when some of the buttons were assembled into atlases and the originals weren't deleted. Once you have atlases, you don't need separate files.
Besides that, the only things I want to do before I release a new update are new unit models for the Colonist and Pioneer (Pioneer using the Wagon Train from Colonization) and perhaps create a few building links. I like the idea of retooling Sculptor's Workshop into an upgrade of Stoneworker's Hut. Stonemason is not part of that, though. Stonemason is specifically part of the Carpenter building chain.