QuoteThere are now more than 100 million web sites on the Internet, which gained 3.5 million sites last month to continue the dynamic growth seen throughout 2006. In the November 2006 survey we received responses from 101,435,253 sites, up from 97.9 million sites last month.
http://news.netcraft.com/archives/2006/11/01/november_2006_web_server_survey.html
<Dr. Evil>One Hundred MILLION websites</Dr. Evil>
I would think we are under that still, well under that. GoDaddy just migrated 4.5M+ domains from Linux to IIS, these domains still return a response when queried, but are not a site as much as they are a pointer to GoDaddy. GoDaddy is just one of a dozen massive domain registry places that do this very same thing.
I would be curious to know how many "real" websites are on the net :)