Using

Making the Mac iSight Camera work in Ubuntu

# cd
# mkdir /mnt/macosx
# mount /dev/sda2 /mnt/macosx
# cp /mnt/macosx/System/Library/Extensions/
     IOUSBFamily.kext/Contents/PlugIns/AppleUSBVideoSupport.kext/
     Contents/MacOS/AppleUSBVideoSupport .
# umount /mnt/macosx


# sudo apt-get install isight-firmware-tools
# cd
# ift-extract -a ./AppleUSBVideoSupport

# /etc/init.d/hal restart

See: http://handyfloss.net/2008.07/making-isight-camera-work-in-ubuntu/