Below is the code I used. You have to know the address of the device you want to connect to, or offer an option to select it. You can have bluez do a search, and/or list the saved paired devices I think. I didn't do it when I wrote this section cause I was just messing around with the concept. I think that if you want to use a pass code you have to have the n8x0 paired with your receiver.

Once you connect, "self.port" acts just like a regular serial port. Reading stream data doesn't work so well (automated every 15ms is a bunch of data and at least in python things seemed to get bogged down some where). But I could send commands and read responses fine. I've used this same trick to talk to my arduino board, my laptop, and a gps receiver, all without any problems (other than remembering to change the bluesmirf's data rate). You might notice that I check to see if the bluetooth adapter is on (trying to use it when it's off throws an exception), and if not I set a bool to true when I turn on the adapter so that I can turn it off again at application close.

Good luck with your program, I'd be interested to see anything you come up with.

-Brad