Finally someone overt at XDA has created a nice shiny kernel that has BNL support. You’ll need both a kernel that supports it AND a rom that does OR a hacked liblights that will allow it. I’m using stock rom, nimphetamine kernel, rooted, and with liblights. You’ll also need the app from the market. It works pretty well so far, however it does draw quite a bit of power. I think I measured a drain of about 150ma with the lights on. Less than the CPU uses but still significant. I’ve turned it off now as it draws too much power. Not much that can be done about that though I don’t think.

Hopefully the Galaxy S3 will have a notification LED. Samsung. Listen!