If you are rocking one of the new Xperia NXT phones then you might like to know about this new app called “Illumination Bar Notification”. The app is meant only for Xperia S, P and U and allows you to set up notification alerts by making the light in the transparent bar flash.
The illumination bar can blink with different speeds or have a constant light depending on your preference. This app will only work on the latest range of Sony Xperia mobile phones that have the illumination bar (the transparent bar at the bottom of the phone). Currently this is the following models: Xperia S, Xperia P & Xperia U. On Xperia U multiple colors are available to choose from (Red, Green, Blue, etc).
Various Settings allow for custom notifications, including the light staying on till the SMS is read, or till the screen is unlocked. Go to the link below to download the app yourself.