I don't know what apple did in 10.8.2 update but since it installed osx can't even boot with native ACPIPlatform (10.8 can do) it stuck at some cpu detection code in log. I tested it on my dev ML installation and it stuck after that
So beware install and reboot osx after update without rollbacking ACPIPlatform
The only kexts I've seen updated are not the ones provided by Joshhh.
Anyway, I've copied over the ones provided again with no luck.
Right now, even the safe mode won't start.
There's a change however. There's no activity indicator [finally remembered how this damn thing is called ;) ] when loading the system, and the HDD led blinks from time to time.
So I'm testing my patience to see if it will boot eventually.
no luck... I've tried installing OS again and performing update without applying kexts/dsdts and... no luck as well.