I need to do some video (ntsc) input to my 15" G4 aluminum powerbook. I know there are firewire/usb solutions but I didn't buy a portable to lug all the extra junk around. Does anyone know if a cardbus adapter that will allow for video input on a Mac? Preferably with sVideo?

you can find solutions here:

http://fwdepot.com/thestore/default.php/cPath/3

you can do FireWire or USB input for DV video

PB G4 17, PB G4 15, G5 Dual 1.8Ghz ,black iPOD nano, iPod Shuffle, iMac Mac OS X (10.4.3) tri-flat panels