Hi - Please think about supporting the newly announced Android Open Accessory Development Kit. This is a new USB (and eventually wireless) support system for communicating to other devices. In particular, it will enable working with Arduino and a range of home-automation gear.

http://developer.android.com/guide/topics/usb/adk.html
http://www.crunchgear.com/2011/05/10/google-releases-the-android-open-accessory-toolkit-for-adding-devices-to-tablets-and-phones/

Thanks!

.phil