Currently, bluetooth works with a few glitches. It should be fully functioning by the time we release the G4. It will also work in the StreetDeck release shortly thereafter.
The QA team has been able to make phone calls from the G4 using their phone book on their phone.
I'm still waiting for the details on this, so please don't bombard me with questions asking which phones will be supported and what features will be supported. As soon as I know more, I will post them.