One thing you can do if you are concerned about your privacy with regard your web history is to log in your account and check your settings:
Account Settings | Services | Go to Web History –> Clear all
So, we're going to continue seeing a convergence of Google's services and the way they handle our data. Google display advertising via its AdWords platform is going to get increasingly refined allowing advertisers to really hone in on their
prey target. Is that a problem or just the price for some great, free online services?