Owners of the beast that is the Samsung Galaxy SII will be pleased to hear about the BLN mod by XDA forum member sicopat.
BackLight Notification will get the ‘menu’ and ‘back’ buttons to light up when you receive a new text, email, or missed call, which means you won’t need to unlock the screen to discover a notification.
The mod is compatible with every firmware/ROM based on Android 2.3.3 or 2.3.4, but not compatible with CM7 (kernel incompatibility).
BLN exists in two versions – the free version enables BLM on the GS2 which will work only with application supporting BLN e.g. GMail, GO SMS Pro etc.)
For further information and to download the free apk, head on over to the modification thread._________