I haven't seen any discussion for these machines, so here goes. The hardware for the R480 is nearly identical to that of the R580 (and I assume the rest of the series), hopefully we can all work together.
I have my R480 running 10.6.4 pretty much flawlessly, all but sleep (which I would really like).
My Hardware Compatibility List entry:
Core i3 2.13 GHz 4 Gigs RAM Install method: Using retail DVD image from other leopard partition using Pacifist. Have to set AHCI to Manual and Enable in BIOS. GUID/MBR hybrid, 5 partitions: Chameleon, Snow, Windows 7, Snow Backup, Data Audio: Realtek ALC269-GR - Working with VoodooHDA Video: nVidia GeForce 310M [10de:0a75] - Working with NVEnabler64 Ethernet: Marvell [11ab:4381] - Haven't tested Wireless: Atheros AR9285 [168c:002b] - Works with modified kext Bluetooth: Works OOB Trackpad: Synaptics - Working with VoodooPS2Controller. Scroll coasting/inertia with Smart Scroll application. Webcam: Works OOB Sleep: NOT WORKING. Tried various SleepEnabler versions and settings without luck. Let me know if you have any ideas (might attempt to tackle modifying DSDT). Got my kexts, etc from package here: http://wiki.osx86project.org/wiki/index.php/HCL_10.6.3/Portables#R530
Anyone been able to get sleep working?