Does anyone know if there's a limit to how many DTV units you can have on an account? Does it matter whether they are dialing in or not? I've heard a lot about "connected to your land-based phone line" blah blah blah. I've only got 5 units right now, but I'm thinking of adding more in the future. I will probably drop the land line to make room for the extra mirror fees, but I don't want to find myself suddenly in a position where DTV says, for that many units they have to dial in, to prove their in the right location, or they're not loaded with PPV's, or what not. Are they more picky about it if you have a sports package like NFLST?