Well, I was hoping to wrap up the collidable/non-walkable tiles tonight, but we had dinner plans and I only had a short while to work on the game. Additionally, I hunted down a handful of bugs that I introduced with the map generation. They were mostly caused by the fact that I was using the Start() method on the units, which was getting called before the map had finished loading, and thus they never registered. Fun stuff.
More gifs soon!