hi please post your briliant developed product or product which you saw or using. only arduino projects please
Have you looked in the Products and Services forum - http://arduino.cc/forum/index.php/board,25.0.html
Or the Exhibition / Gallery forum - http://arduino.cc/forum/index.php/board,29.0.html
Where people do what you are looking for.
You can find lots of "briliant developed product"s in the online stores (sparkfun, adafruit etc etc etc)