I have a DirecTivo box in my living room that feeds both my living room TV and also my bedroom TV.

Ahh, I see. The "right" solution to this problem is the networked ReplayTV solution, where you've got Ethernet carrying compressed video around. Of course, TiVo doesn't make it easy to do that for the DirecTiVo boxes. Maybe you'd be happy with a second DirecTiVo?