Google Testing Rich Media Ads

According to JenSense, a great blog about contextual advertising, Google is conducting a limited rich media test, including interstitials, floating and expandable ad units. There are still many details that unclear as to the specifics of the test.

But JenSense brings up something very important to think about:

"if AdSense did offer rich media to all publishers, they could easily
add a new clause that would mean companies such as Fastclick and
PointRoll would suddenly be competitive ads and not be permitted on the
same pages as AdSense."

I think this is probably a good guess, since Google's already established a track record in this area.