Where can I and where should I publish projects so that all can view them?
Is there a section in this forum?
Scroll down to the Exhibition/Gallery forum http://arduino.cc/forum/index.php/board,29.0.html, unless it is a commercial product, in which case I believe Products and Services http://arduino.cc/forum/index.php/board,25.0.html would be more appropriate.
Or put it in the Arduino playground: http://arduino.cc/playground/