After 24 hours of debugging, i am up and running on 10.8.2. The issue seems for me atleast was in installing the HW monitoring applications last time when i was at 10.8.1 using Mutlibeast 5.0.2. I had installed the following and so had to remove the following kexts (depending on what you installed using Multibeast) from S/L/E
if you have installed motherboard plugins from Mutlibeast delete:
ACPISensors.kext, IntelCPUMonitor.kext, OemSMBIOS.kext, ITEIT87x.kext, WinbondW836x.kext, FintekF718x.kext, NSCPC8739x.kext and NuvotonNCT677x.kext
If you have installed Nviidia GEForce Plugin please delete:
Installs NVClockX.kext FakeSMC plugin in /System/Library/Extensions/FakeSMC.kext/Contents/PlugIns
If you have installed HWmonitor application please delete HWMonitor application from the app folder
I think it will be a good idea to reinstall Fakesmc from multibeast to avoid any plugins the monitors may have installed within fakesmc.kext in the past
I am not sure AppleACPIPlatform.kext is the issue as the 10.8.2 update does not seem to have touched that kext.
Rebuild kernelcache using kext utility and you should be set.