Starting on slide 7, he goes into the steps needed to make bitcoin. He moves from a centrally issued ledger system into cryptographic currency, and then into decentralization. After that, he covers the block chain.
He very clearly groks bitcoin and the history of electronic and cryptographic currency systems, enough so that I wish there was a video. If he's even a halfway decent speaker, the presentation that goes with these slides is probably excellent.
Ahh, here it is:
http://vimeo.com/27177893. I haven't watched it yet, going to now.