The Zeemote JS1 is a Bluetooth peripheral that e.g. comes together with some recent Nokia phones. You may find it on ebay as well.
This short video shows interaction with an Android G1. You want to see multiple JS1 controlers connected - so you may play multi-player games on one device? Your first idea was "pong !"? You want to see the controler connected to other devices - that may even have TV out?
You will see all of this !
More to come!