The Attention Metric
Compete.com has released "The Compete Attention 200" which attempts to help accurately measure user engagement. Developing an engagement metric is challenging but if done correctly can help advertisers plan and measure their ad spends more effectively.
From the post: The Attention Index is based on the amount of time
U.S. internet users spend across the top one million websites. The Compete
Attention 200™ represents the best of the best each month.
Who made the cut? The top ten should really be no surprise. MySpace leads the pack, followed by Yahoo, MSN, Ebay, Google, AOL, Pogo, Facebook, Amazon and Craigslist.