I always wanted MIDI-ports to N900. Would it be very hard to make Kenton MIDI USB Host work with N900: http://www.kentonuk.com/products/ite...usb-host.shtml
It needs only N900 to act like USB MIDI Class Compliant device.
I think it could be work without h-e-n, because it assumes USB B-type socket.

Of course it would be nice to get some of multiport usb-interfaces work, but I think it needs much more work.