You probably could use the s-video out on your DirecTiVo and connect it to a new standalone TiVo. However, as a DirecTV customer, you can get a Series 2 DirecTiVo from DirecTV for $99. I, personally, would go that route. It would be much easier than looping your old unit through a standalone TiVo, plus you would get better picture quality.
Oh, and using the DirecTiVo would only cost you $4.95/mo for the TiVo fee versus the $13 for the standalone unit.
I currently own a DirectTV Sony SAT60 with built in TV. I would like to get the new series 2 tivo version and have been told not to hold my breath for DirectTV to create an upgrade.
So my question is, can I buy the new stand alone tivo and connect it to my directTV SAT 60 and take advantage of the series 2 features?