As some of you have heard, we released a new feature in AdWords last week that enables advertisers to place content-only bids for ads that will run on the Google content network. You can read more about content bids on the Inside AdWords Blog or on the AdWords Help Center.
We had planned to expose this function via the API this week. However, based on developer feedback, we've decided to delay the release until mid January (so as not to introduce large changes in the middle of the busy holiday shopping season).
In early January we will update you on the timing of this release and provide an advance copy of the WSDL at least one week before the launch.
--Patrick Chanezon, AdWords API evangelist