[Highland Park] TiVo?

Thanks for the responses concerning phone/internet/TV in the neighborhood. Responses were Comcast, Verizon FIOS and a smaller company called Cavalier. I'm wondering if any of you know if a TiVo can be used with packages from any of these companies, or do I have to give up my beloved TiVo in favor of one of their DVR? thanks, -justine