So, with all these different versions of USB and Firewire going around, which one truly is the fastest? It was my understanding that the list went like this (from slowest to fastest) USB 1 USB 2 Firewire 400 Firewire 800 Is that correct? Are there any other benefits of firewire or USB? Ive heard the new intel macs can boot from a USB drive now. So what are the pros and cons of each?