Also coming here with SGN and new abyss kernel - test notification works for me, but in normal use BLN does not work (only missed calls not tested yet)
Update: sorry, email is working. Seems that third part apps do not taken into consideration by BLN. Is it possible to make an option to track them?
However some apps dont offer support for led notifications or just dont expose the settings for led notifications or some app devs just screw up led notification support in their apps (like samsung in the sms app). I am working on a comprehensive solution for this problem, but that may take some time.