Tenkar's Landing Crowdsourced Sandbox Setting. A dozen and a half hexes have been laid claim to so far and there are many more looking for a good owner ;)
In all seriousness, I'm really stoked by the enthusiastic reaction to this crowdsourced project - by the community, for the community.
Once things really start moving full swing, I expect much of the project will move over to Obsidian Portal, but at this early stage of the game, a G+ community does us fine.
The Tenkar's Landing Crowdsourced Sandbox Setting currently stands at 49 members and growing. Not bad for something that kicked off on October 8th. Join us and you too can have the fate of a 6 mile hex in your hands...