i was wonderin if the bluetooth on arduino bt connected to rs232 or not?
I'm not sure I fully understand your question, but the bluetooth module is the wt11 from bluegiga which does have a serial RS232 interface which does connect to the ATMega chip on the Arduino using RS232 (though at logic level voltages not the usual +/- 12V).
Also, JP2 is connected to the Tx/Rx signals. It should be possible to set the Tx/Rx pins on the Atmega to a high impedance state and connect your rs232 (at logic levels) to JP2 to drive the blue tooth module directly.
What are you trying to do with it?
Regards,
Mike