Here comes Flash Notify to the rescue.
You will never return that missed call 2 hours too later while your phone was on silent.
With Flash Notify you can set you camera''s flash to act as your notification LED.
Flash Notify allows you to designate different styles of blinks for different actions on your phone (missed call, e-mail, SMS, MMS, voicemail, receiving a call, or google talk).
PLEASE NOTE: NOT ALL DEVICES SUPPORT FLASH NOTIFY OR ALL OF THE BLINK STYLES DESIGNATED ON FLASH NOTIFY. YOUR PHONE''S CAMERA FLASH IS NOT DESIGNED TO WORK AS A NOTIFICATION BLINK. PLEASE USE FLASH NOTIFY AT YOUR OWN RISK.