So I just had my Comcast service installed today here in Ann Arbor. No problems, the HD offering here is pretty nice, 13 channels in total right now. After setting the whole shebang up I was curious what kind of action I could get out of the firewire ports on the DCT-6200 Comcast gave me, figuring that it wouldn't work after reading posts here. We're an all-Mac household here, so the obvious first step was to try VirtualDVHS and see what happens. The Powerbook picked up on the 6200 and listed it as a properly connected device called "6200" in the System Profiler (hardware manager for the Win-heads.) Initially, I could click the record button but nothing much happened, it created an empty .m2t file but not much more. Then I realized I didn't actually have the 6200 tuned to an HD channel (duh) and as soon as I changed to InHD and hit record, *boom* it started writing something to disk at bitrates anywhere between 8 mbit and 15 mbit or so. 10 seconds yielded about 16 megs of material and anxious as I was, I went to VLC to play the .m2t file back. Lo and behold, it worked! 
Playback was a little too much for my poor 867 mhz PB G4, but it seemed to be all there. Mind you, I haven't yet figured out a way to play the recorded material back through the 6200, but I'm gonna keep tinkering some more. Short story, it seems that at least over here Comcast is rolling out 6200's with at least partly enabled firewire ports. Good news, I'd say.
Playback was a little too much for my poor 867 mhz PB G4, but it seemed to be all there. Mind you, I haven't yet figured out a way to play the recorded material back through the 6200, but I'm gonna keep tinkering some more. Short story, it seems that at least over here Comcast is rolling out 6200's with at least partly enabled firewire ports. Good news, I'd say.