Does anyone know what kind of range can you get from the iPhone bluetooth? Also, would the connection be strictly one to one? I know you can choose from a number of peers to connect to but once the connection is established, it seems you can only transfer data between one peer? So basically, is it possible to create some kind of "multiplayer" experience?
Apple iPhone 3G has a Class 2 bluetooth module. Class 2 Bluetooth devices have a communication range of 10 meters.
At a given instance a device can connect to just one device because it follows a master/slave communication model. But still we can perform a multiplexing. So we can virtually connect to more than 1 device and by rapidly changing the connected device.
I found a good article here. It explains bluetooth very well.
According to the my knowledge, multicasting is not impossible with bluetooth. So gaining a multiplayer experience is NOT impossible.