Handheld 3d printer pen 3Doodler features and usage cases presented on LeWeb conference by Maxwell Bogue.
Source:
http://www.youtube.com/user/leweb?feature=watch
Update:
New 3Doodler presentation from CEs 2014 with new accessories:
http://diy3dprinting.blogspot.com/2014/01/3doodler-3d-drawing-pen-updates-from.html
