OK, I want one. Bad. BUT, I use digital TV, is there a digital cable Tivo out there (That's NOT DirectTV or DishNetwork?)

Some places (in the Bay Area?) that have AT&T cable can get an special series-2 TiVo that works for their cable system. If you're out here in Time Warner land, however, you're out of luck, or you're just connecting a standalone TiVo to the analog output of your pre-existing cable box.

As to ReplayTV vs. TiVo, I went with TiVo specifically for the dual tuner and direct satellite digital recording features. Among other things, when the premium channels transmit Dolby Digital, you get that on playback. I suppose it would be nice to beam shows from my TiVo to my PC or something, but it's not critical for me. However, being able to have digital audio output from the TiVo is a fantastic thing.