New web traffic stat tool

Intrerested in trying out a new tool to gather stats about your website traffic? Check out the beta release of Quantcast. Signing up is free, and then all you do is place a snippet of javascript code into pages for which you want to gather stats. What kinds of stats?

We observe anonymous records of visits to internet destinations. For a portion of these observations, we have certain information, such as the age, gender or income level of the internet visitor and/or their household. This group is called a panel and forms one aspect of our analysis and reporting methodology.
We also analyze internet log records which include information such as the page viewed and the IP (internet protocol) address used to access the page.

You can read their privacy policy here.