Empeg (in car) and the Internet

I am getting a new Kyocera 2235, which has a SERIAL data cable, with the usage of the phone basically being a wireless modem. Docking sled serial to the phone. Now with this possibility, I was wondering what everyone thought for apps for our empegs that could use this. The phone has a total hands free kit available, with a box to plug the serial into as well.