Eric,
Your research sounds very interesting. As to your
question I have come across a few sites that you may
want to take a look at:
1)http://www.internettrafficreport.com/
2)http://ratings.miq.net/compare-by-REACHABILITY-Large.html
3)http://www.internethealthreport.com/
These organizations may have what you are looking for
or this could be another starting point.
Good Luck and keep me posted as to how things are
going.
Kevin Facinelli
webmaster@colosource.com
www.colosource.com