Same here on Karmic Linux 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64 GNU/Linux
$ lsusb Bus 002 Device 003: ID 046d:0870 Logitech, Inc. QuickCam Express
$ hal-find-by-capability --capability video4linux.video_capture /org/freedesktop/Hal/devices/usb_device_46d_870_noserial_if0_video4linux
Same here on Karmic Linux 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10 17:01:44 UTC 2009 x86_64 GNU/Linux
$ lsusb
Bus 002 Device 003: ID 046d:0870 Logitech, Inc. QuickCam Express
$ hal-find- by-capability --capability video4linux. video_capture p/Hal/devices/ usb_device_ 46d_870_ noserial_ if0_video4linux
/org/freedeskto