I'd be interested in the answer to the satellite radio question.
For the phone, you will run into difficulty as the star tac apparently has some special card in it to make it work with the computer/dashboard display. I've not seen any aftermarket solutions. I decided to keep my LG cell phone which I liked and just toggle on/off to forward the calls from it to my car when I was driving. Costs a little more per month for the extra line. (You can also set up the call forwards to avoid having an additional voicemail box to check.) Good luck.