-wdlove
Well, I wouldn't really call it hacking as this is just using the technology for what it was designed for - too bad it's left in it's "Hi there" state.
I guess I was doing something like this to people a few months ago with my 12PB.
I'd set if for discoverability, then let someone us it. I'd take a picture of them with my Nokia 3650, then beam it to them.
Imagine their surprise when suddenly faced with a pic of themselves.
But then, BT is designed specifically to do that.