I read somewhere that SX1 will have USB, and then i wondered if it's possible to use a USB-keyboard with it...
USB in SX1
The SX1 doesn't have a USB connector, just USB interface. So you would at least need an adapter.
I guess BT keyboard is a better solution. Should be possible to make some kind of Symbian/Series60 software for this, if it's not already available 😊