I'm wondering: Can I pair my iphone with my ipad or macbook via bluetooth? Can I pair my iphone with another iphone via bluetooth? What is the range/distance that the bluetooth will work? My current setup is iphone 3g, ipad 3g, macbook air (will be getting the iphone 4 shortly if that matters). Also regarding the iphone 4, I'm currently with ATT which has been annoying given the cost. I've heard talk of people getting an unlocked iphone 4 and using it on Virgin/Sprint (in US), is that possible, recommendable?