Alternate Gaming Network
I'm obviously very very late to this party and despite I have literally zero time to "dig up" story parts and piece them together, I am intrigued by the concept. It seems this site (and this article in particular) is a good place to start. As of 2005-06-17, there is this Art of the Heist game running and Perplex City which seems like a ARG with a collectible card (UGH! YUCK! UGH!) aspect.