If you're interested in controlling LED or LCD modues remotely this may be a useful solution. Created by Forward Computing and Control, it uses an Android application that accepts user data and parameters which are sent via Bluetooth to the Arduino with matching Bluetooth and the display hardware. You don't need to write any custom sketches for the Arduino side nor any Android code - so the entire process is quite easy. And the Android UI is simple as well, for example:
For more information on the system and the Android app, visit the product page. And for more, we're on twitter and Google+, so follow us for news and product updates as well.
Instead of building your own LCD module shield, save time and move forward with the Freetronics LCD & Keypad shield which contains a bright 16x2 character LCD and five buttons that can be read from only one analog input pin: