USB host would be such a killer feature on the N900, shame Nokia didn't include it... Think of the possibilities:

- Plug in your real camera and upload photos you took with it.
- Copy files from a friends disk-on-key without needing a computer.
- Plug in a printer (is it possible?) to quickly print documents you have on your phone.

I honestly don't know if all the above are possible, but if they were, and the next N9xx had them, I'd never consider another phone again.