Phonelink works for dialing & sending sms via bluetooth.
It cans also detects when the phone rings or receive an sms and let you pick up the phone or reply to the sms.
it works IF your phone is supoported by the gnokii lib.
There is a page on the wiki that shows the phone that works or don't.
once installed you have to configure the connection through the control panel apple called gnokii-gconf
Phonelink can also get your phone numbers from the built-in contact database or the GPE contact database (if you have installed it) for this you have to install ContactInfos.