I'm using legacy kernel 10.6.6. SL updated to 10.6.7.
I've the the same mobo as yours - M4A89GTD PRO/USB3.

Snow can see my processor, as "Unknown" but correct speed and all six cores (AMD Phenom II X6 1090T). It can also see all of my RAM - 16GB DDR2. GTX460 is working at full speed and resolution.

Here are my current problems:
- System won't run without -force64 flag
- No audio (tried with both, voodoohda and alc892 kexts)
- I'm not able to run Kext Utility
- Firefox and Safari are freezing often