Older entries:

• Google Not To Include Quality Score In AdWords API | February 21, 2007
• Google AdWords Adds Quality Score, Budget Analysis & New Algorithm | February 15, 2007
• YahooSarah Talks About Yahoo!'s New Quality Score | February 9, 2007
• Early Feedback on Yahoo's New Ranking Model for Paid Ads | February 7, 2007
• Declined Credit Card Notice Won't Affect Quality Score in Google AdWords | February 1, 2007
• Google's Quality Score To Impact Ads on Content Network (AdSense) | January 24, 2007
• Google Quality Score Helps Determine AdWords Ad Delivery | January 16, 2007
• Screen Shot Of Quality Score Metric in AdWords Console | December 25, 2006
• Google Normalizes Click Through Rate For AdWords Quality Score Scoring | December 21, 2006
• Google AdWords Updates Quality Scores At Least Monthly | December 20, 2006
• Google Testing Showing AdWords Quality Score Data to Advertisers | December 5, 2006
• Webmasters Discuss Possible Changes to Google AdWords Quality Score | December 4, 2006
• Google to Update Landing Page Quality Score Factors | November 7, 2006