Firewire.
Firewire is the way to go if your system supports it... (Mine does! :P) but they also have USB, and internal PCI cards capable of doing what you want. I might suggest looking at what they have at the Tiger Direct website.
Http://www.tigerdirect.comI have ordered all of my parts for my computer from this site without having any problems excepts a bad power supply. Delivery is usually pretty prompt unless the item is backordered.
The following link should take you to the page with the video capture devices:
http://www.tigerdirect.com/applications/category/category_slc.asp?CatId=314Hope this information is worthwhile...
Jared