I ran across an interesting new tool when I was perusing my list of linkbacks in analytics... Quantcast - Open Internet Ratings Service.

The traffic listing they had for me appeared too low, but I was very interested in the demographics they had, and it occurred to me that sort of info would be of significant interest to possible advertisers. I'd like to diversify from my "adsense is the only thing that makes my site any money, damnit" stategy, long term.

So I opted to quanity by placing their code along with my analytics. It hasn't run enough yet to give me more info (and it initially showed even fewer uniques, but i've no doubt some of it is just the process.)

I'll be interested tosee where it goes. I notice they adversitse some pretty heavy hitters among their signed up users, including wordpress and typepad, among others...

update- i found a post about this here- http://www.vbseo.com/f30/publicly-po...-forums-16771/

reading the site's methods, it explains they use a combination of publically avail information and data sampling from a panel of over a million tracked people. it seems reasonable to me. maybe they added info since that discussion.