I've gotten gnokii to start phone calls and send SMS's from my N95 and N810.

Installed the latest gnokii and rfcomm, used the "AT" phone settings. Changed the rfcomm to 4.

Got the BT MAC from the phone and put it in. It lets me dial and send SMS's. Although I can't receive anything. Ends up being a BT keyboard for SMS sending (not super useful).

Hope this helps.