So after a little more testing, only a few problems: I cannot get rid of that hanging at the IOAPIC on boot, so booting is taking longer no matter what. I'm guessing it's bootloader related, it happens whether or not I have the DSDT in and no matter what settings I set Chameleon to have, even with the bare minimum of extra kexts (basically just fakesmc). I also cannot get the system to sleep/wake properly, whereas Lion works perfectly. The system will sleep the computer, but upon waking will cause the computer to freeze, wiping the CMOS. Just so you all know, my PC is an Asus P6TD Deluxe with an i7 930, 6GB RAM and 2x GTX 570's.
I also cannot get my iCloud mail to work in the new 6.0 mail client (no doubt a bug in ML). It just doesn't load anything after the account is added.
Other than these things, it's pretty smooth. Hopefully everything will be working by the next Developer Preview/GM