Amazon is an interesting company for many reasons. From a technology perspective, they are very forward thinking. From Amazon.com bookstore, to the kindle book reader to the amazon cloud (for the non-techies, this is a place for developers to build their applications on and share with the world)
Werner Vogels (CTO of Amazon) gives a 30 min talk on Amazons growth story and how they organize their teams and think of various problems.
I found this very relevant to me and the stage of my company where I am building out my team and making various decisions on the technologies that we use.