Service Electric sells cable cards »www.sectv.com/LV/cable_card.html
The NEW Cable card laws say that you can Use your own set-top box without extra charge. FCC Rule 76.1205(b)(5)(C). Your cable operator may charge you to lease a CableCARD or tuning adapter, but may not charge you an additional service fee for using your own digital-cable-ready television or set-top box.
It's some thing that a court needs to look at and make a ruling.