I started doing this after someone came up to talk to me and I realized that I’d recognized him from a particular place a few years earlier but could not for the life of me remember his name!

Now that I read it, I start to think some wiki-like engine with sorting by tags and with hyperlinks can be useful there. If you encounter that person you called like Jason a couple of times without remebering their name, you would be able to collext every piece of info about them if you queue Jason-guy. Hmmm.