There's a pretty neat visualization over at Nmap.org that shows the 300,000 biggest websites on the internet, according to Alexa. Early in 2010, they performed a large-scale scan of the top million websites and then retrieved each site's icon or favicon. They then pared it down to the 288,945 most heavily trafficked sites. Each area of each icon is proportional to the sum of the reach of all sites using that icon. The largest icon is, of course, Google (which looks gargantuan compared to everyone else).
Did you know that My Modern Metropolis made the list? We're somewhere in that sea of icons, coming in at 10,715! Very cool.
See larger version or check out the poster version, here