New traffic laws in my province are in effect starting tomorrow, that require a handsfree/speakerphone while using a cell phone in the car. Given that I already use my n810 as an in-car media player/GPS, I'd love for it also to work as a handsfree.

Has anyone made it work with any combination of software? Is there an open-source program for a PC that I can try porting to Maemo? I too would pay for this development effort if it would help.