I've been asleep to the tech of the past couple years, and perhaps it hasn't been explained thoroughly enough, but--what IS this PCIe Flash Storage stuff on the new MacPro? No drives inside the canister, I assume. So does the PCIe Flash just store up the data and dump it to slower drives outside the MacPro as you go about doing work? What are the implications when you are shuffling huge amounts of information across drives, etc? Does the PCIe flash slow down and choke the computer? Anyone out there using this type of device on current computers? I'm sure others must be wondering if this is just a cheesy way to reduce size and price of the Pro or a true innovation which will revolutionize desktops.