I occassionally wonder whether, if Apple had been a little more reasonable on the early licensing of Firewire, there even would have been a USB 2.0.
I have USB 2.0 ports on my machine right now and I'm not sure what I would plug into them if I had the money to buy whatever I want. Nothing that I currently use is lacking for bandwidth expect possibly my CF cardreader - and I doubt it would be that much faster with USB 2.0 than it is with the original USB. Digital videocameras would be something, I guess, but I don't really need one. And I have removeable IDE HD's anyway, so external HD's won't do me any good.