What I do is use a capture card. It gets the job done pretty good, threw the composite, to get the voice I would have to probably use another recorder with something to combine the sound channels. I have not done this in a long, long time. Then I would combine the sound and video in a
video editing program.
I like the Dvi idea instead. I think they sell those little boxes that can capture MPG, with video and sound together and then you could transfer it over to the computer, and edit from their. I remember seeing them around alot.
Fire wire was implimented earlier for high-end camcorders, digital records, and television cameras, and they do a great job.