Full article: infovore
"There’s a copy of me running around London. It runs at the right speed, but it’s unstuck in time: unstuck by 365 days, in fact.
Tom Armitage In The Past is a foursquare user. He checks in where I was a year ago. He says what I said a year ago. As long as the game systems haven’t changed, he gets the badges I got a year ago. (And, if the game rules do change, he’ll start to deviate from me).
He’s maintained by a piece of software I wrote called ghostcar.
In racing games like Ridge Racer, your previous time attack high score is often represented by a 3D outline of a car rendered into the same world as you – a “ghost car”. Matt Jones reminded me of this at the pub one night, as I explained my idea, and the project had a name."