Hi Peter

To clarify something: the previous tablets (770, N800, N810) had USB OTG, so they could switch between being a host and being a peripheral.

The n900, unfortunately doesn't, but this is due to hardware. There is a very long thread about it here (as thecursedfly pointed out).

However, neopwn recently made this post regarding the possibility of creating an external usb hub that may work with the n900.

It's not that anyone has a problem with you asking about it, just that it's been (and still being) discussed to death in that other thread.