Please number your slides in future! This would help us to reference your slides in our notes (useful with the amount of info in your slides)
Having mentioned the NoSQL movement, some coverage of that would be useful - how they compare (can they compare?).
Some coverage of performance and would have been useful. Not extensive, but to say whether these examples are usable in the real world or academic examples.
Would have been more interesting if delivered by Facebook themselves to the more technical ins and outs could be answered, rather than by the Facebook guy during the questions at the end.
Showing the bog standard generated code wan't of interest.