Finally crash-free! And my framerate was fine too once Aeryk helpfully reminded me to turn down my settings. I'm building the Observation Deck on the mountain -- you should be able to see it from the cake shop. Right now it looks terrible, but now that I've got ladders built and so hopefully shouldn't fall off it every two seconds, work should come along a little better.
Spent the weekend in Mendocino. I saw this and decided, hey, I should build that in Minecraft: