Here's a 3D printed monkey head using Blender.
It's Suzanne ! It's Blender's mascot monkey 3D printed with a Makerbot. It's about 45x40x50mm from a 3mm black plastic spool, and sits on your desk on on your keyboard staring at you with its docile eyes.
It's a little lumpy, mainly due to the low resolution of the printer, but a little bit more planning could've improved it a little - as seen below:
You can see where the scaffolding was attached as well as where plastic dripped down, causing some unevenness in the layering.
For the technically-inclined, the model was exported to obj, then re-exported
to stl in Rhino (because Blender's stl didn't seem to work), and then the
rest is standard as documented here.