I was wondering what is the FASTEST possible external harddrive connected to a MacBook Pro. I assume it would be a SATA connection through the ExpressCard slot. Is this true? What would be the speed compared to the internal HD? Would I be able to boot through this HD? Or in other words, would I be able to have my OSX Partition on the internal HD and the Bootcamp/XP partition on the external ? Thanks for your help!