Followed guide perfectly with exact build, did install with DSDT.aml to get HDMI audio. Installed 10.8.2.
Got everything to work beautifully, but the thing wouldn't sleep -- the video would stop, but the system would be still running and would not wake up.
From reading the thread, many have had this problem -- some have said to roll their own DSDT's and other such ideas.
For me, I just downloaded the latest copy of SleepEnabler.kext and used KextBeast to install it.
Voila! Perfect sleep-wake. Hope this helps someone
Thanks for all the great support fellas.. lovin my new machine.