One thing you can do is get a microcontroller that does USB host, get a cheapie android phone online, and wire it up that way using ADB. I wrote a library to l

One thing you can do is get a microcontroller that does USB host, get a cheapie android phone online, and wire it up that way using ADB. I wrote a library to let a Parallax Propeller do this (it will be more power hungry than, say, an IOIO board, but it can give your phone 8 serial ports rather than just one). http://obex.parallax.com/object/116 http://obex.parallax.com/object/116 Economies of scale mean that a low end android phone costs about as much as this shield.