Based On:
- Galaxy Nexus Android 4.1 OTA
- Modified Kernel CM9
What works:
- Booting
- LED-Flash
- SD-Card (Internal Only!) (Jellybean Is using diff read format Oo)
- MTP (does only see internal storage, not external, cant copy files)
- ADB
- Vibration
- ON
- gsm (fixed by bpear96)
- logcat (fixed by bpear96) by info from
- network data (fixed by stormtroopercs)
What does not work:
- Wifi
- Bluetooth
- Room
- Google Search
- Audio
- Logcat
- blackberries do not know anything
Below is a video showing Jelly Bean on Galaxy S2.