The session that I proposed for DrupalCon San Francisco 2010 on 2.4 million page views per day, 60 million pages per month, one server was accepted, and I just finished giving it.
Note that from the time we proposed the talk, until we actually delivered it, the site hit new records (2.8 million page views per day, 70 million page views per month).
Here are the slides from the session, which I designed to be useful on their own, even for those who did not attend.









