UPDATE:

You may wish to print this lovely remix instead, which adds ports for the camera connector and GPIO: https://www.thingiverse.com/thing:1619546/#files

An easy to print sleeve for the new Raspberry Pi Zero $5 computer. This prints vertically, with a notch for the raspi to slide in snuggly, with a separate lid that snaps into place. The example shown was printed with natural PLA with stock settings on a Makerbot Replicator clone.

The design was inspired heavily by this case by Walter Hsiao: http://www.thingiverse.com/thing:604915

I did the design in Blender, and have attached my source file, which makes liberal use of boolean subtraction for port holes and vents and whatnot. While it is a functional case at the moment, I would like to improve it, especially the snap-in lid, so please leave comments if you have suggestions on how to improve it, or feel free to remix! I've attached my blender source file as well, such as it is.

Thanks! Hope you find it useful.