Google is launching Gadget Ads, rich, interactive advertising in Google’s “gadget” widget format which can run anywhere on the Google ad network. The main difference, apart from the flexibility of the rich media environment, is that these ads can be added by users to other sites or to iGoogle pages allowing a viral dimension to advertising for the first time. Interesting move. Jeff Jarvis thinks this will put Google in competition with the publishers it has always claimed to have a symbiotic relationship with.

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