Tonight I finished adding all the Cooking items, and went on and added the Brewing, Pestling, Mining, and Papercraft items, too. Then I went ahead and added everything in Blacksmithing, Armorsmithing, and Weaponsmithing for good measure. Tomorrow, I'll finish up by implementing Wood Armory and Artificing, and then begin working on item interactions, like proper stacking, context menus and dragging from the inventory, so that you can actually use all of them. However, even now, the burrow looks quite good; if you compare it to the videos above from the Game Maker client, they look almost identical. We're getting closer and closer to parity!
I still have a lot of UI stuff to readd, namely: sounds, some visual effects, the equipment menu, container inventory, action handlers, targeters (mostly also for actions), popups (although I have a sample to go off with the options menu), motes, burrow editing, the message backlog, dialogue/emotes, and spots for the gathering skills. Not to mention testing and fixing bugs. But, it shouldn't take me more than another week, fingers crossed. Pica's been hard at work on the cooking and brewing expansions and other new content, so they ought to be ready by the time I'm ready to work on them.
(video snipped for dev sanity)