Using the motor shield and Bluetooth

Hi

I am planning on using the motor shield to control 4 motors and 2 servos but I also want to use a Bluetooth module to remotely control the system using an Andriod app and smart phone.

What pins can I use for Rx/TX. It appears that only 2 and 13 are left. Would these work? Could I use two of the analogue pins?

Thanks
Eoin