As soon as they (finally!!) release the C2D MBPs I'll finally be upgrading from my now antique G4 powerbook. I was planning on turning it into a general file & testing server but I wonder how long its HDD is going to last. I was considering buying two external drives and putting them in RAID1 but can I use that as a boot drive for OSX? And what happens if one of them fails (I'm aware of RAID1, but not software RAID1 boot drives on OSX)