I think my experiences seem on par with everyone else's. I've installed OSX 10.5.1 - 10.5.6 all with no problem on the IP35 Pro except for sleep/standby. I can shutdown and restart with no problem, but I've never been able to get sleep working. I chose to make the install as "vanilla" as possible, so I used the retail DVD and then use a modified version of the v4.4 pack offered in http://www.insanelymac.com/forum/index.php?showtopic=86167. For Video (8800 GTS 320MB), sound and network, I use EFI strings. Sound requires use of Apple HDA Patcher with ALC888.txt. Using this vanilla install plus the new Chameleon 2.0 RC1 bootloader (which should be utilized in whatever guide is being made -- it really is quite nice), I've installed OSX in various fashions on a different number of hard drives. My current set up boots off a Mac RAID 1+0 (ridiculously fast), although I've constructed simple 2 disk mirrors and stripes, and installed OSX using ZFS as well (although not bootable). I'd be happy to amend any guide with instructions on those setups. But yeah, the sleep issue is annoying, especially given that everything else works flawlessly, and the dual internet is handy when running a parallel environment. Do we know what the issue is? My guess is a missing identifier in the AppleACPIPlatform.kext. I've had ACPI issues with Ubuntu installer CDs (have to add acpi=off to the boot string), but am not sure of the conflict. Does anyone have more experience?