Here are the top 30 websites in the entire world according to Comscore (stolen from Fred Wilson)
A couple thoughts:
I was surprised to see Conduit.com on the list. I simply didn't realize they were that big. Conduit makes non-spammy, branded browser toolbars! Internet sites brand and distribute the toolbars as a way to push updates to their users through the toolbar. Conduit has a strong relationship with Google--Conduit toolbars come with a Google search box and Google pays Conduit for every search. Conduit shares the revenue with the brand that distributed the toolbar.
AOL is number 6? Wow! Tim Armstrong, you can make AOL worth more than $2.5B easy!
For all the hulabaloo around Twitter, it's still smaller than the New York Times and about 10% the size of Facebook (even if you assume that 50% of twitter mobile users don't ever visit twitter.com)
20% of the top sites are Chinese today. That despite China being home to more internet users than any other nation. And despite cultural differences and the Great Firewall of China, which isolate Chinese users/encourage adoption of homegrown sites (as opposed to their American forefathers). In the next 3 years, Chinese sites should comprise >50% of this list!