I'd have to agree with Rob here. USB is primarily a convenience thing. Hence "Universal Serial Bus". The whole idea was a connection that could do it all, and it's worked pretty well. Having actually designed and built a couple of USB devices (mainly for my own amusement), I can say that it's a pretty good standard.

When you actually *need* fast, sustained transfers you're certainly better off with FireWire, which is why professional equipment such as video and audio editing/recording gear uses it.

I also like E's idea. A simple and highly available 4.7 Gb/s interconnect between hosts would make for some pretty slick clusters...