Blokify - 3D Modeling Made very Simple
Has anyone seen this yet? I just saw it on a tech news site I read every morning.
http://vimeo.com/76463363
More about Blokify at http://blokify.com/about
I would imagine, after a while they will make the blocks smaller, for more detailed prints.
I don't see why they couldn't have a zoom feature on the app to let you basically fine tune the details using blocks that are as small as the tip of a pen.
They allow you to print using their service or send the design directly to your own printer.