TECH NOTE
FireWire WebCams are powered by the FireWire Bus. Most laptop computers and CardBus PC card adapters for laptops do not supply Bus power.  An exception is the ADS PYRO 1394DV for Notebooks.  This CardBus PC card has a built-in power jack, which when used with the optional power supply provides Bus power allowing use of FireWire WebCams as well as other Bus powered FireWire devices such as portable hard drives.

• ADS PYRO 1394DV for Notebooks

Additionally you may provide FireWire Bus power to a FireWire WebCam using a powered FireWire Hub:

• SIIG FireWire Hub