Cool Idea! I've been working on my own version of this since Nov, 2010. I have my own implementation and right now I'm trying to integrate it with my EEG for even less friction. Mine logs Sms, E-mail, Twitter, Facebook, Banking, Computer activity, etc and aggregates them all looking for the moments worth recollecting. I could never see my software running on a non-private infrastructure as it pretty much contains every detail of my life from what I eat to my sleep patterns and where I am at any moment.