had this app that turned on my backlight whenever i got an SMS message, but i cant seem to find it in the app store or the crackberry store. I believe it was free also.
the app i had was called "sms display on" and it was free. in the about it says "by Fabian Heuwieser" also the app only did one thing which was turn the display on when an sms came in. it wasnt a full sized app