MegaZone has news and pictures of the new TiVo Series 3 at CES! From his post it sounds like what a lot of people have been waiting for TiVo to deliver.
The biggest features are that Series 3 will have dual tuners and be CableCARD and HDTV ready! The dual tuner thing should be qualified though, because it will actually have 6(!) tuners. It will have 2 cable tuners, 2 ATSC tuners (for high def over the air) and 2 regular old NTSC tuners. But it will only be able to record two programs at once, according to a sign at the booth (warning 900k picture).
Other improvements include an SATA hard drive connection to add external storage, a display on the front that shows what's recording and a backlit remote. While it will still record in MPEG-2, the Series 3 will also be able to play back MPEG-4 video.