Google's AdSense has recruited some publishers for a limited beta test of rich media, including interstitials, expanding ads and floating ads, writes JenSense, according to which campaigns are likely to be site-targeted rather than contextual. The post surmises that rich media firms such as Fastclick and PointRoll are probably not pleased at the prospect of having to compete with Google if it were to offer the new formats to all publishers.

Read more about Adsense testing rich media at http://www.marketingvox.com.