The RepRap project (http://reprap.org
) has just chosen the Arduino for its future developments.
RepRap is a 3D printer that makes real solid plastic objects, so you can use it to make lots of useful stuff.
RepRap can also print most of itself, so - if you have one - you can print another and give it to a friend. That is to say, RepRap is a self-replicating machine...
Following the principles of the Free Software Movement, RepRap is being distributed at no cost to everyone under the GNU General Public Licence.
Dr Adrian Bowyerhttp://staff.bath.ac.uk/ensabhttp://reprap.org