http://www.avsforum.com/avs-vb/showthread.php?threadid=386740
VirtualDVHS
You can use your Mac's firewire port to record HDTV, just like a
JVC DVHS deck. Recording is easy, but playing back HDTV requires
CPU horse power.
You can do similar thing with Windows XP, but guess it's going to
look better on 15" Powerbook :)