TiVo killer? ReplayTV 4000. Up to 320 hours of recording, Ethernet support, video sharing over the Internet, control via the web... and, this is cool: "iChannels: Now that your ReplayTV 4000 has broadband connectivity, we can send you unique programs that you can't get anywhere else." How 'bout independent video producers sending their own stuff? All in all, sounds pretty bitchin'. Ships Nov. 1. Starts at $699 (for 40-hour version, $1,999 for 320).