Oh, and, for me, it was a Nokia phone, not a WinMo phone. I still found myself doing tons of juggling back and forth. Turn on and off Bluetooth on both devices. Start the connection. Got a text message; answer it. Go back to the NIT. Got another text message; answer it. Go back to the NIT. Got a phone call. Go back to the NIT. Got a text message; answer it. Go back to the NIT.

Even if you're careless about security so that you eliminate those parts ... it's still too much device juggling.