Anybody use Tivo through DirecTV (i.e. you pay for Tivo through DirecTV for $5 a month and have the combined DirecTV reciever and DVR)? I would like to do this, but do not have a land line, I use cellular only. Do you know what functions are inoperable when you don't have a phone line connected? If it is like my DirecTV reciever, it is only the ability to order PPV, which I do not care about. I have called DirecTV and nobody accessable to me can answer the question. Do you know if any of the "DirecTV DVRs" will utilize a broadband connection in place of the phone line, like replaytv? I have a LAN in my house, but no phone. Thanks.