How easy will it be for more targeting pt. 2

http://paidcontent.org/article/419-inside-word-what-the-netflix-prize-says-about-the-shortfalls-of-ad-targ/

http://andrewchenblog.com/2009/09/21/whenever-ad-networks-talk-about-their-targeting-remember-the-netflix-prize/

<a href = "http://andrewchenblog.com">Andrew Chen</a>says Netflix prize that improved recommendations just 10% shows how hard it is get big increase in targetting, esp for startups: "new ad network where you end up with noisy datasets, lots of crappy traffic...10% is not a big enough number to counteract the other economic drivers in the ad market, which revolves around better deal terms, a larger selection of advertisers, better ad inventory, etc."

Thinks opportunity is for better ad inventory getting clickthroughs of plus 30% (which the best do) and  better data beyond domains, cookies, and ad impressions which everyone has..maybe using own customers data no one else has access to (tho there is netflix again)