Darren... I don't know if you saw my response to your post on SL or not, so I'll just repeat it here...
"Darren, I spoke with the guys at Greddy at SEMA. The first guy I talked to was clueless, and said "We don't offer ANY CARB legal turbos or superchargers." As in for ANY vehicle. Another guy overheard him and corrected him. (I already knew they had CARB legal kits for other cars.)
Anyway, the other guy who seemed to have a clue said, "It has been discussed. We may be getting CARB certification for the xB turbo." I then asked him about the xB supercharger. His response was, "I don't think there are any plans for CARB certification for the supercharger."
Take that as you will. A vague response from a random Greddy employee at their SEMA booth. At least it gives us some hope that the turbo may be legal... some day."