How Big Is The Internet

http://www.businessinsider.com/the-internet-is-ridiculously-huge-2011-1

http://www.blameitonthevoices.com/2011/01/how-big-is-internet.html

http://netforbeginners.about.com/od/weirdwebculture/f/How-Big-Is-the-Internet.htm

For some reason the size of the Internet is hot news.  Almost 2 billion people are now online, with 600 million of those on Facebook.  Google has indexed 1 trillion unique URLs.

So if you want to participate in some particular topic, you have a pool of 2 billion people to find fellow enthusiasts.