Doug from Aderit Internet Marketing Consulting brought a new WebmasterWorld thread to my attention. The thread is named New SEARCH TOTAL Default Bid Link. This thread explains a new feature enabled by AdWords that allows you to separate our bidding for your content ads (AdSense) and AdWords ads (search ads). More info on What are content bids?
Content bids let AdWords advertisers set one price when their ads run on search sites and a separate price when their ads run on content sites. If you find that you receive better business leads or a higher ROI from ads on content sites than on search sites (or vice versa), you can now bid more for one kind of site and less for the other. Content bids let you set the prices that are best for your own business.
Forum discussion at WebmasterWorld.