Below are some 3D prints; click on an image to see more of that object, or visit the Mineways Flickr group for lots more. Please do submit photos of your creations to the Flickr group or email them to me - I love seeing what people do.
You can also see some of my favorite Shapeways examples from all over and Sculpteo examples from my nonprofit store.
There are other services and programs that help you make 3D prints or otherwise display Minecraft creations. My full list is here, below are a few examples.