A good friend of mine has a Happauge application that he uses with his cable and Happauge video capture board on one of his PCs to write shows to the hard drive.
He has (as do I) a wired and wirelss network, and the Happauge application allows you to use the PC as a DVR and stream content over the wired or wireless (I think it depends on how much you compress etc). I think there are others (i.e. Roku Photobridge et al) as well. With the Happauge (and I suspect otehrs), as I understand it, you purchase a small box that has an IR receiver, and RJ-45 connector (the wired network version) and an S-Video output, along with an analog left and right audio output. The box also acts as an IR receiver that communicates back to the host PC what stream you would like to watch that has been recorded (you get a sort of TV Guide screen like what you might see on cable or satellite to help you browse for shows to be recorded or that have been recorded). In essence, this (and I assume others) allow you to run the DVR (on the host PC) as though the DVR were in the room. Like the Audiotron / Roku / Squeezebox.. they are independent, so they can all share the data (even though I don't yet have the NAS, all three of my Audiotrons see the same shared drives for my wavs, and I often have all three playing at the same time - works perfectly at each station).
It's clear that 2000 - 2005 have been years of immense technical growth, and it's only going to get more capable and more affordable (well, that's my $0.02 anyway).
Man...do I love this forum...
Mark