via the BlueZ stack or some of the other bluetooth phone tools, it should be possible. However, it may require some work on the user's part. Making that work by default is high on the priority list for us devs once we get the core system more developed.
As for the radar, there has been a request for this by multiple people. I would like to have this myself also. So support in the future is likely. If anyone want to jump in a write a client plugin for nGhost, that would speed up things (kinda like what HalNineThousand and Miatacarpc did with the hdradio plugin).