I started playing around with the Bluetooth settings on my iPAQ. I didn't get far, though. Take a look at this collection of screenshots off my iPAQ - you'll see that it's waiting for a response from a BT-enabled device.
I can't wait to use this thing as a control device.
(And as something only a techie could love - my iPAQ has a little blue blinking LED when BT is turned on. It's a nice, calming color.)