Alexa site ranking is controversial because it only relies on the data it gets from people who actually have the Alexa toolbar installed. I have been tracking our rank since years and it is surprisingly accurate. Often it is totally off, but if you look at the overall trend the Alexa site ranking is a good way to classify most sites.
When I just was checking the rank today I noticed that Alexa now displays new statistics. You can now see the rank you site has in each country and where your traffic is coming from.
You can see the new statistics on Alexa for instance for I4U News, Engadget, Gizmodo or CNET.
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