I just got my Tivo 3, it will be hooked up tomorrow. I also plan on getting a Tivo Series 2 but my question is on MRV. Will this feature work once I got the 2 units connected on my network and I know it wont be til November for the Series 3 but once November comes will these units be compatible. I read somewhere that only Series 2 units can communicate with Series 2 and Series 3 with 3. Is this the case. Also since my bedroom does not have a HD TV, I only need to get a basic unit. However I have Time Warner here in Orange County, Ca. Will the Tivo 2 units work fine without a cable box from my cable company. The lady on the phone said it wouldn't without a cable box. Thanks.