DOWNLOAD: CyanogenMod 10 beta1

You should make full wipe after installation, but there shouldn't be any problem if you're updating ICS to JB.

DOWNLOAD:
http://maclaw.pl/

NO MIRRORS!

What’s working:
  • RIL (full – GSM/SMS/EDGE/3G/SIGNAL etc)
  • Audio
  • Microphone
  • Small speaker
  • Sensors (strange issue with proximity)
  • Project Butter (100%)
  • Full 2D/3D acceleration
  • Touchscreen
  • SD card
  • Native Android app2sd (.android_secure)
  • WiFi
  • Bluetooth (really, really buggy)
  • Browser
  • Mass storage
  • Live wallpapers
  • GPS (people saying it working fast)
  • Deep sleep
  • YouTube
  • FM radio (as in CM9)
  • Headphones

What isn’t working:
  • Proximity
  • Camera

Changelog:
----beta1
  • small speaker fixed
  • microphone fixed
  • headsets are working (whole, 3/4 pin etc)
  • fixed videoplayback
  • new RIL – better stability
  • CM10 sources updates
  • Themes support
  • fixed native app2sd (.android_secure)
  • Macław’s libaudio (ported to JB by Wayland)
  • a lot of things, which I forgotten to mention
-----(pre)alpha1
  • We're introducing you first working release of Jelly Bean for our devices!