Credit:
I'm fascinated by networks, communities and markets. So excuse me while I bring up yet another fantasy prediction market. CrowdIQ is doing much the same thing as Inkling, but this time you can set up your own prediction markets around a topic. From the site:
CrowdIQ allows you to make your own market and create your own contracts so that you can directly leverage the intelligence of the crowd. Rather than the contract content coming from the market owners, CrowdIQ allows you to become the market owner so that you can produce and manage your own contract content. There is no software to purchase and download, no consulting services, and no technology commitment.