Here is a good read for you. (it's just being launched by Philips)
It's like CSI forensics in codecs. Works ONLINE with videos but also with pressed DVDS
http://www.business-sites.philips.co...ome/index.page
http://www.business-sites.philips.co...ogy/index.page
http://www.business-sites.philips.co...cts/index.page
resulting in:
http://www.mediahedge.com/
Philips systems even spider ALL webpages on the net and report to the content owners that work with their system.....and tracking it down to to source where it orginated from