See, I think Borg-like archiving is the easier part of the problem (although of course, I have no idea to capture and save perception, I believe it can be done, and anyway simpler capture process, like yours can be created). The real challenge is how to catalog and browse such a database. When I enter my personal history, it needs to be analyzed, main themes (and memorable parts) labeled using an ontology and all this needs to be presented using an intuitive UI.

Researchers have pursued similar goals for image/video databases for more than a decade now, with little success (think how you search YouTube or Flickr: mainly through manual tags). Any that is a much simpler problem.