Introducing, the finished back wall:
I dig it. I soooo can't wait to finish this bad boy!!! Now, there are aspects of crookedness, and in the future, when making a wall like this, I think I'm going to get some long, thin wood slats and just make sure they're cut to length and forego the popsickle sticks. I wanted to work with what I have, though. I still think it looks good and once I have items in the building, it won't be noticable.
YO JOE!!!