The Game Neverending

While this isn't an ARG, it looks interesting enough to have an overlap appeal to the ARG audience. The Game Neverending is being developed by a company called Ludicorp and, according to the website, is scheduled to begin alpha testing of the prototype this month. From the site:

The Game Neverending is a web-based massively multiplayer online game of social, political and economic interactions. It's pretty interesting.

Thanks to Stewart Butterfield and Eric Costello of for the sideways tip-off via their email about changes in store for the estimable 5k.