alexa.com for one - but their acuracy is not that good.
They rate themselves as #6 - LOL
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Is there anywhere where you can find a list of the most popular sites on the net in terms of hits?
I just finished re-building a site that should get 4 million individual (non unique) visits this month:
(Warning: Don't visit if you hate pop-up windows and "Do you want to set your homepage to ....", I hate them but the really drive revenue)