He quotes also Eric Brewer with his CAP theorem:
"Eric presented the CAP theorem, which states that of three properties of shared-data systems; data consistency, system availability and tolerance to network partition one can only achieve two at any given time."
Btw.: during VLDB 2007 we had the opportunity to interview Werver Vogels and Eric Brewer to very similar topics. Check out the blog article (Interview with Vogels, Interview with Brewer, and get the audio!