Here is a link to the list of the Top 10 web brands as measured by engagement of audience. This data is from Nielsen as of July 2011.
AOL is still a Top 10 network of sites pulling in at # 7.
Google and Facebook rule as # 1 and # 2.
This list hasn’t changed much as to Top 10 participants in a long time. I thought this list would be of interest to you. Thank you.