Google officially announced a new project called the Android Open Accessory toolkit. It allows people to connect an open source hardware interfaces like Arduino with Android system.
To make the communication between Android and Arduino easy, we would like show you a new way that Android interact with Arduino and other similar boards by Bluetooth and our APP.
I think many people will be interested in it, so I am glad to share with you. You can click the following link to see the whole process. You will like it. Communication between Android and Arduino with Bluetooth(2) - Blog
Think this post better fits under the exhibition gallery as it seems to me that you don't have concrete questions for your project. OK you have a question in the title;)
That said, I find your project interesting and FYI, I see the number of AA postings increase by the week.
Rob