I was really wondering the same thing, but in a different way.
The current Touchwiz builds all have issues with playing music in A2DP stereo.
This is caused by low bitpool settings, which are compiled into their proprietary bluetooth stack.
This could all be fixed by using an AOSP-based kernel (and thus bluetooth stack).
I'll be honest, I would prefer vanilla ICS, but I would be happy to skin Touchwiz ICS, provided they at least fixed the BT issue.
Another way of asking a similar question is if cyanogenmod plans on integrating the S-pen into CM9 for the Gnote.
The current answer seems- maybe after Touchwiz ICS is released... maybe