So I just bought a new SR (non-unibody) 15" MBP. I was looking at the Optibay option, but there's something that doesn't make sense. On their website, you can purchase the Optibay online, select what they call the "1st generation MBP" (which I'm assuming means an intel, non-unibody) and it gives you the option of choosing a 500GB SATA drive. My understanding is that the optical drive bus is EIDE ATA100, not SATA. Do they have some sort of internal conversion going on that allows you to use SATA drives with a PATA bus, or have they figured out a way of running another SATA drive off the original SATA bus? I know you can run multiple drives off a SATA bus, but I don't know if you could do this with the connectors on the MBP. Any speculation? I emailed MCE, but I don't expect to get a reply - at least, I haven't received anything yet.