This just in from CDM:
Android just got a whole lot more interesting for hardware development. We can already run music apps and tools like Processing and (via libpd) Pure Data patches on Android. Now, you should soon be able to plug in joysticks, custom hardware, sensors, and other devices and make Android a go-anywhere live music and visual platform.
Link: http://createdigitalmusic.com/2011/05/android-adds-usb-host-mode-open-ha...