I was wondering where I can see stats/reports/analysis about where
pageviews go, by type of information or type of site.  I'm trying to
figure out the % of pageviews that go to webpages where individuals
publish content (like discussion groups, web logs, and geocities-type
sites), vs webpages published by news organizations, corporation, etc.

So rather than seeing the top 50 Media Metrix hosts, it would be nice
to see that 2% of pageviews go to geocities-type sites, 5% go to
corporate websites, etc.