This is great! Ambient data can be really powerful. I'd never thought about it before, but having a little sense for how many users are on my sites and what they're doing would be hugely motivating.

I once wrote a command-line program that would take the first n bytes of every file in the new directory and pipe them to sox to create a sound unique to the directory contents. It was good enough for a while that I could recognise projects I was working on by the sound of their root directories, but of course required headphones and the glitch sound was quite hard on the ears…