The 8310 is not BlueTooth enabled. For full specs please see here: http://www.nokia.com/nokia/0,5184,930,00.html
You say if NO what do you do???!!! Well there are aftermarket BT kits available, whether they work with the 8310 is another matter. I cant remember where I saw such a kit but im sure you can plug in a Bluetooth Transmitter to your phones Handsfree socket and it will TALK to the accompanying bluetooth earpiece. Like i said they are available but whether they work with the Nokia 8310 i do not know.
Other than, a new phone is the only other route. 6310i's are nice!