Same here on Desire....

It's actually not as complex as it might seem.

Android phones have USB ports and MIDI/USB interfaces are plentiful (although I do prefer the good quality ones).

All that's required is for the manufacturer of the MIDI/USB interface to write a driver for the Android phones.  Then a simple Mini or Micro USB to standard USB adapter would be all that's needed to get data going from the phone's USB port to the MIDI/USB adapter.

Then its up to the app developers to build programs that will use the interface.

What makes the MIDI Mobilizer so unique is that it goes into the iPod (proprietary Apple) interface.  Any device that has a USB port, won't require such an interface, it will just need drivers for a MIDI/USB interface.  The only concern would be the device deliering sufficient power to the MIDI/USB interface.

Cheers,

Crusty