They have several swappable nozzles for it now and a stand for it that serves as sort of mouse with buttons that gives you extra control and precision.
http://www.the3doodler.com/
Update (11.8.2014.):
Here is the DoodleStand in action:
Jan 14, 2014
3Doodler 3d drawing pen updates from CES 2014 are swappable nozzles and DoodleStand
They have several swappable nozzles for it now and a stand for it that serves as sort of mouse with buttons that gives you extra control and precision.
http://www.the3doodler.com/
Update (11.8.2014.):
Here is the DoodleStand in action: