Our TiVo has been acting up for the last week or so.  It appears that the video outputs are going out.  It might have something to do with the amount of heat that fills up our entertainment center, and if anyone has any ideas on dissipating that heat feel free to share, but I digress.  This little failing has finally spurred us to move to HD.  I ordered this component A/V switcher, which should arrive tomorrow, so that everything I have can be plugged in at once and can be all component all the time.  I ordered the HD-DVR from Comcast, which I will go pick up on Wednesday.  They currently only have the single tuner DVR available, but my name is on the waiting list, so as soon as the dual tuner DVR is available, they will get in touch with me.  I'm just about 100% positive that I'm not going to like the new DVR interface as much as I like TiVo's, but renting this DVR monthly is just going to tide me over until the time that someone comes out with a standalone HD-DVR that is CableCard ready and supports multiple tuners.