From what I hear, it sounds like it could be close to a DD. From the XDA post
WHAT'S WORKING:WHAT'S NOT WORKING (NOTE: I expect to be able to fix all of these issues, it's just taking some time):
- [01/23]MMS Fix(VZW)
- [01/18]Incoming phone call bug fixed
- [01/16]Bluetooth device starts/stops correctly (audio issues still)
- Phone / 4G Data
- Wifi
- Display rotation has been fixed
- Camera should work for images/video
- GPS
- HD codecs for YouTubeHD and Netflix
- Bluetooth audio needs work (leaving Bluetooth ON but unpair will cause the entire device to lose audio, turning Bluetooth OFF while unpaired fixes)
- No hwcomposer yet for enhanced composition (wifi display, gpu enhanced overlays for battery savings)
- GUI has some graphical "tearing" when moving rapidly through screens. We need to update graphics binaries to fix.
- Wireless tether has some fields mixed up
However, for me, when I installed the JB Kernel 10.1, my camera does not work and the phone does not recognize external SD. I know people used to have this issue with earlier versions, but I'm not sure if people still have this issue or if its just me.
Pretty sure those fixes are for the ics kernel only. It's kinda misleading because the op is for ics only but you're able to download both the jb builds and ics from there also.