conq writes "BusinessWeek has an article looking at how internet advertising has changed and is changing. From the article: 'The race is on to find new ways to track customer behavior. Advertisers and agencies are progressing far beyond the standard arithmetic of counting clicks and page views. They're tracking the to-and-froing of the mouse on Web pages, and they're finding new ways to group shoppers by age, Zip Code, and reading habits. CEO David S. Rosenblatt of DoubleClick Inc., which serves up some 200 billion ads a month for customers, says that every campaign now allows for 50 different types of metrics'"