The Online Journalism Review takes an exhaustive look at contextual ads from Google and Yahoo - "the good, bad and ugly" of it all - discussing the pros and cons of AdSense and ContentMatch, with input from the likes of Jason Calacanis, John Battelle, Gokul Rajaram (group product manager for AdSense), and Jennifer Slegg (who runs JenSense, a blog about contextual ads). The theme: "Embarrassing juxtapositions have plagued contextual ads on media sites and blogs. But they can fit well with commercially focused content." (via paidcontent)